[brudgers]

I find DrRacket sufficiently fast and sufficiently frustrating.

It's very useful for interactive debugging but dependent on the mouse and many Emacs key combinations simply cannot be mapped because of it's CUA interface...and so far as I can tell there is no key-combination that switches focus between the REPL pane and the Editor pane short of closing the other pane.

The syntax analysis gets to be a bit much too.

On the other hand, that's just the price of an IDE over a text editor, and for a batteries included IDE, it's pretty good even if I wish that the effort would have been put into Emacs support while knowing that doing so would not meet the needs of the PLT group's target audience of students.

[anaphor]

by default ctrl+f6 will switch focus. You can remap that to something more convenient though (it's called shift-focus).

[brvs]

I think you can switch panes with C-x C-o, same as the Emacs combo.

[aaronem]

That's C-x o; C-x C-o in Emacs runs delete-blank-lines, and I'm not sure what it does in DrRacket.