Perhaps part of Tiffany's response had a bit to do with listening to it during their own season, which was just a stones throw away from this season. The more familiar you are with a person the shorter your fuse can be at times. We see a new, improved Angelo, however, people who were there to witness and remember the old one are not going to let go of those memories as easily.
Tiffany doesn't seem to be in the same spirit of the competition as she was the first time around, but in all honesty, there are quite a few others who seem the same way so far. Perhaps they are just shaking the dust off and hopefully they will get in the swing of things pretty soon. I have no doubt that they all want to be there, but a few of them just seem a bit off.