I think if you look at their findings as a cookbook recipe for success you won't do well — but if you take what they're saying as advice to be applied if it makes sense then it has some value. Some of their findings I've also heard echoed before (like doing it full time, having a technical co-founder) so there's also a bit of a confirmation value there. Although on the flip side you should keep in mind that "scientific research into success" can be flawed — I keep thinking about reading about Freddie Mac in "Good to Great".