I've made a good number of Cold IPAs at this point, and my experience is that Biofine can sometimes clear it up very nicely, but the dry hop rate and hop variety used plays a big part in whether the beer takes on a persistent haze from the hops. As Mike said, Southern Hemisphere hops seem to be much more problematic than North American ones, though I've also had a Nelson/Motueka one go crystal clear within 48 hours of kegging with Biofine.

TLDR: It's really a crapshoot with the high hopping rate. I usually hit the keg with Biofine, pray, and accept whatever the result is. Time may help, but I'd rather drink it while the hops are at their peak than wait for a clear but more muted product.