No, generally, they're doing much better than they were, say, 5 years ago (word: iMac, fruity colors). But the economical slump in the US has hit them hard, like everyone else.
Apple is the #1 provider of computers for schools and stuff. Dell had the crown last year i think but Apple's got it back. So some good business for them.
Still, i'm not sure how they're doing overall against the other manufacturers like IBM, etc.