That's why the forums are so helpful. Really, my core group is used to looking for flaws in what's going on, and are used to me stopping the game a couple of times per night to give an update I coded on the fly. I'm not trying to avoid playing with others, but you work with the time constraints you have, right? I've been working so far today for... hmm, 14 hours. And I've still got another good 2-3 hours to go. Then tomorrow I'll wake up late, come back into the office, and work for another 8ish hours. Then more in the late evening. Then repeat.
I play with my alpha group partly because they are good at testing certain things, but also because I... uh, built the game to play it with them.
We've been playing co-op RTS since '98, and I was sick of the cruddy other implementations. So I created my own. It's basically the main time I "see" my dad each week, and keep up with him and my uncle, etc. So it's no offense to anyone, or that I consider others "common folk" or anything. But I'm just not much of an Internet gamer anymore, haven't been much of one since college really, and so I just don't think of it. I'm pretty much either working or spending time with family, so there's rarely a time where I sit down and can even play single-player games if I'm not doing it under the auspices of testing.
Not trying to rant by any stretch -- but I get that question quite a lot, more by email than anything, and I figured it's better to give a complete answer than to seem stuck up or somesuch. Anyway -- I imagine I'll play with others before another year goes by, but right now all the AARs are super helpful.