I actually don't agree with Bisping that is a piss poor excuse. I've delt with insomnia my whole life and I travel internationally... jet lag is no joke, and is a bitch to recover from.
Should he have made the fight, absolutely, but it's more serious than taking a nap and hitting snooze a few times.
As far as pride, I think this season is starting to turn around a little bit the more fights they get into it. Hopefully the trend will continue.