I'm surprised GB is on people's list here.
GB has lots of pauses. Pauses to start right-orbit modes, pause in the saucer (and wait video mode too), pause in the scoop, and the ball can spend forever in the pops. The captive ball feature also slows the ball. GB can be difficult and fun, but I've never thought it to be especially fast relative to some others.
Met is similar; it can be pretty fast at times (faster than GB I'd say), but there are lots of times where it gives you breaks.
IM only has one spot where the ball sits for a short time at the center spinner while the monger raises. The only other time the ball pauses is Whiplash but you can't take a break there as the ball can come out fast, slow or at some evil angle. All of the stand ups bring the ball right back at you and of course the War Machine kickback is there to top it all.
I can often take a quick drink during GB; I've never even tried on IM.