That's no surprise. Isn't everything big in Texas?
well... not EVERYTHING...
I think the ground shrinkage (sounds like a Seinfeld episode, doesn't it?) is because they LOOK bigger than they are because of the fur. Sort of like what I've heard about black bears.
Most of the coyotes I've seen here in north Texas appear to be in the 35 lb range, but I have no empirical data. I'm hoping to get to try to thin some out on a friend's deer lease in a few weeks, so perhaps I'll get to check it out for sure.