I did say that in one post, but maybe I should clarify. I went in expecting no difference in service, b/c I didn't believe what I had read. But, in our first Dining Plan TS experience, Sci Fi, our waiter seemed to stop being interested in us after we told him we were on the plan. Maybe he's like that to EVERYONE, but it seemed he wasn't too happy about us using the plan. He didn't refill drinks, and wasn't there too often. I was kind of surprised, but nothing was bad enough to want to complain, especially since it was our first day, and we had nothing in WDW to compare it too.
Not the worse service we had, but really seemed to change after we mentioned the plan.
Same thing at Chef Mickey's, though they were busy, so that might explain her inattentiveness, but we never got drink refills here, EXCEPT for my dh's beer, for which we paid out of pocket, and a 18% gratuity was guarenteed due to our party size (8+). But maybe she was just not a good waitress.
On the other hand, at both Le Cellier and Crystal Palace, we were treated very well, and had refills even though the place was extremely busy. If we had eaten at one of these first, the other 2 would have seemed worse.