I've been to Cabela's recently and they didn't have any tiger trout that I recall. I'm pretty sure they'd stick out to me if they were in there. I love looking at tigers.
The fish that sticks out most to me is the monster hook-jawed, hunchbacked brookie in there. He's a crazy looking fish. Some of their bass are swimming around funny because their backs have humped up so much.
As far as the food supply goes, I'd say that all depends on the actual types of food they're getting. Minnows, flies, pellets, worms? The fly eaters won't grow as quickly as the minnow eaters or the pellet fish. The pellet fish won't taste as good or look as pretty as a fish that eats natural foods IMO, but they probably grow way faster with a plentiful supply of nutritious power pellets getting tossed to them all day.
The fish at Cabela's kind of scare me, though. I love staring at them, but the big bows really look cloudy in their tank. Maybe it's just the light overhead, but it just doesn't look right to me.