Yellow Jersey has built thousands and thousands of wheels. An extra-slow build might be 30 minutes. If it takes that long they are probably doing other things like phone or email while build is in process. A fast build is twenty minutes. Stores that basically don't build wheels cannot work at that pace. The build is every bit as good as the one that was sweated over for an hour or more. Probably better. In most cases they also sold you spokes or whatever and they get you as a customer in future. Makes perfect sense to have a low build charge.

Dishing tools are plain cheap. Look around. There is no reason not to use a dishing tool.