My congi shipped fine too... though his tail showed some fraying and discoloration at first, he also ate the first day despite the prophylactic parasite meds I threw in there. He (and everyone else) also survived my back hiatus, despite the less than stellar tank maintenance I was able to do for over a month, so pretty hardy in general!
As for fat fish... one of my ornates has the same obesity problem as the teug, except when I feed pellets it'll actually gorge itself so badly that it eventually regurgitates a bunch of it, then I end up with gross hikari puree floating around until the overflows suck them up *barf*