I was waking up at 10-11 AM worked through the day without breaks until 5-6 PM, had dinner with my better half, watched some TV, met with friends, etc and then typically resumed working at around 10 PM for another 4-5 hours. That works out to about 11-12 hours per day. Plus another 10-12 hours per weekend -> a bit over 70 hours per week.
I was going at this pace for close to 2 years. The work included designing and coding the product (windows/linux/osx clients, the backend server and the web interface), graphic design (incl. website), system administration and support of a live server cluster, support (ouch), busdev, etc .. pretty much everything except for the accounting and legal/IP stuff.
Stressful, but totally doable. YMMV of course.
Do you have data for any people post acquisition?
Custom queries FTW!
I do however spend about 10+ hours working as a TA for my dept.
The weeks I do more than 40 are followed immediately by a week of 20, or less.
For years I tried to force myself. Work longer hours, be more productive, get more done, yadda yadda. Don't know about others but when I'm being forced -- by myself or others -- I automagically go into "stale mode" and refuse to do anything other than the most menial motions. Haven't really found a 'fix' for this but accepted that I don't work under compulsion (even self-imposed) and now go with the flow. I found that's the only choice left for me, other than completely resign from self-dependent work. After a relaxed summer and too much freelancing before that for the last 1-2 years I'm now only carefully and slowly going back to building stuff, and only up to the level that I enjoy doing it. It's been going up steadily ever since. But still a far cry from 100 hours a week, to be honest.
At work it's generally about 40-44 hours a week give or take. I used to stay longer at work but when you have a loving girlfriend at home and your own personal projects to work on (not really a startup persay) then it's hard not to go home once it hits 5pm ;)
At home, it varies by the week. Right now I'm in the push mode for one of my projects and am trying to get it done by end of week so I'm doing about 2 hours a night on it, and more on weekends (This Saturday I did a 5 hour sprint, was fun!)
I don't consider the latter "work" though because I really love it, but it's still something I hope will benefit my resume. Making money would be a nice side effect though
100 really is doable if you like what you're doing. I don't really get the "you can only be productive 40 hours a week" people. Really? You can only be productive with less than a quarter of your time? Seems suspect. I can see it being a fair limit for work an employer, but when it's your own baby, if I'm not working, I'd probably rather be. You end up wearing such a variety of hats as a founder that it certainly lacks monotony.
I do try to take at least one decent block of time a week to unplug and go out, usually dancing. :-)
Tonight however is an exception to the cooking rule. Tonight I will be cooking Tex-Mex (fajitas, I think) for about 5-8 people from the local startup scene. You're welcome to drop by if you're in Berlin at the moment. :-)
Most weeks, I work 9 or 10 hours a day, (5 on the weekend days). This is a completely sustainable pace.
When my wife leaves on a business trip, I sprint for 12 to 14 hours per day.
Because I'm forced to take time between sprints, and because I anticipate them coming up and get excited about them, I manage to get into the "programmer flow" on almost every sprint.
I don't believe capping your work week at 40 hours (as recommended in many books) is the right way to maximize productivity because sprinting can be useful and fun. But you can't try to sprint every day, either.
Doing some back of the napkin calculations, I work ~80 hours a week on average. At least 60% of the time it's doing things I enjoy a great deal, though.
We're launching a new version of our service this week, and maybe I'll be able to cut some of that down a bit for a little while. It's hard, though, because there's a lot of stuff that needs to get done.
More hours doesn't mean more progress.
But at some subconscious level, I'm always thinking about work -- even when I'm sleeping. I've lost count of the number of times when the solution to a problem has come to me in a dream.
EDIT: typos.
Even 40 seems like way too much. I'm going to 20-30 as soon as I'm making enough hourly to meet my investment goals with it.
* To demonstrate the usefulness of a poll widget
* To mess with people
* To argue that the results are probably well off the mark
* To get downmodded for the first time in a while
Please do not troll.