Sorry but I don't share your view. I am using IDEA everyday (Python). It's great, but it's a HUGE memory and CPU hog (although IDEA 12 is much better). I always lament VS...
Java just doesn't scale, if you want fast code you wont use java. C++ one of the best, and for quick development c#, you can always invoke C++ libs in C# anyway and both are supported in visual studio. If your into webdevelopment even there java is slow.. despite it has some fun libs, but most people use them because their lazy programmers, a good programmer wont rely that much on much external libs
Twitter uses Java. It seems to survive major events fine these days. I'd say it scales reasonably. You also have to take into account huge enterprise deployments.
As for 'fast' it really depends what you mean. Nobody's going to dispute that running a compiled application written in C is going to beat the pants off anything running on top of a VM, but is that speed factor important all of the time? Of course it's not. Most of the time a short wait is perfectly tolerable in exchange for the assistance in writing correct code that languages like Java can provide.
