No idea, I've never taken it in for anything like that. The only mechanical work I've had them do is to swap out cranksets and headsets ( as crank and threaded headset tools are the only things I haven't bought yet ;-) and they're always very willing to do that on the spot. The couple of times they've done so they always do it for free, so I make sure I buy at least $10 or more of stuff along with it.

I've heard horror stories from people at other shops who have waited weeks during the early spring for things as simple as cable replacements. So the time of year probably has a lot to do with it.