I would have to agree. I have used Avent teats, the wide neck ones, and DS hated them. There were also some teats on the market that were "drip free" which were a bit silly, as you couldnt test the temp of the milk on your arm with them. The only way to do it would be to squeeze the teat with your fingers, which would not be hygenic.
I found the best teats for DS were the PUR brand. Never had a problem with them.