Originally Posted by skim7x
From what I've read, it's pretty technician specific whether they do a good job or not.
This is 100% true. You can have great techs at a mom & pop gas station, and a terrible certified tech at a dealership. So if you find someone - or know someone - with a good reputation, you should generally follow them wherever they go.
Sometimes it can be the shop though. Owners make more money when worker bees work faster, and so do the worker bees themselves.