I don't know if you are curious or trying to make some sort of strawman argument.
If you are curious, I am sorry I can't spill many details. But I have done a startup and several projects in the past, and am currently involved in a startup.
If you are implying I don't know anything because I haven't done it myself...well I guess I answered that.
I also have quite a few friends who have done startups to pull some anecdotal evidence from.