Tracking drums a few bpm slower

I do this sometimes... usually no more than 2 or 3 bpm slower. still helps. i find it works better with good drummers though... if they're already rushing it, it's not gonna make it easier to slow it down.
 
/**disclaimer: not appropriate for running a business*/

tell the fuckers that how they're currently playing it, there are 3 options:
have it sound shit
have it so it might as well be programmed
fuck off and practice/write some music they can actually play!

/**on topic*/
I don't think anyone will notice if the consecutive uninterrupted cymbal hits in a piece are a little bit late if you're only slowing by a couple of BPM. Hell, it might even add a cool sorta swing in slower sections as long as you don't let it go too far