My guess is that the buds were far along when you got hit with a cold spell/frost/freeze which killed the buds, thus no blooms, particularly since you said others in the community didn't bloom. If you find some that did, I'd wager they were on hills... Sometimes this happens with flowering trees. Doesn't hurt them, particularly since we don't want fruit off them....and provided it doesn't happen again next year, they'll bloom very well indeed.