The other guys are absolutely right about the verb, however if track count is an issue like it was for me on a session the other week where I could only have 4 inputs to record the entire band live then adding reverb to the drum submix is acceptable (long story, doing stuff on the cheap etc.). If the only way to get the sound you want due to limitations is to add it during tracking (even if it might not be perfect later) then you have to make a call, however if you can multi-track properly, there's no need to destroy stuff too early, you've got heaps of times to screw things up later!!
