>"I mean, could write Scala in TextMate, too, if I had the jones for it. But I could also not, and use IntelliJ, because I value having tools that are able to improve my productivity."

I would argue that it would depend on the person behind the keyboard. I love VS but I happen to be working all day on vi at work and here I know colleges that are as fast or even faster than a lot of people relying on Intellisense. So my guess is that YMMV