You make some pretty good points, and I've learned to texture my early alphas if the initial layout works. It saved me some work, which I think is nice. However, in koth_shell I still used dev textures in a1 and kept many of them for a2-a5 because would rather start out with plain red walls than some ugly building made entirely of repeating brown wood. I just think it looks better, and when I start to texture, I spend some time to align and vary the textures I use, which means that starting out with them is a pain in the ass. Or, as an alternative to this post, read grazr's post again.