A Tumblr clone with $27 million, and a bunch of users, but so what? What are they actually doing any different from Tumblr?
There has to be something different, since users are joining Pinterest in droves. Non-techie women on my FB feed are raving about it.
How about you ask passionate users of Pinterest why they find it so fun?
Exactly my experience. The pins I see in my FB feed are almost exclusively from women, and are almost all non-technical (fashion and home decor seem to be very popular). I've never seen anything with this level of uptake for that audience, except maybe Facebook itself.
Pinterest gets non-techie women. It's going to be huge, IMO.
I'd proffer that it doesn't really matter what they're doing different from Tumblr; whatever they're doing is working and organically engaging a very large number of users. Try their service if you want to see what state-of-the-art social onboarding feels like circa 2012.
The main difference between one company and the next is the hype/cool factor. With a comment toned like yours it leads to the point that many developers are interested in personal ego than actual software.