I agree...when you take it to the dealer (a different dealer), ask to have the mechanic go with you on a ridealong. That way you can show him what you mean and he can experience it for himself.
Some dealers are great, but others are amazingly uninformed. I took mine in for a problem with choppy acceleration and the guy told me that "it is not a V-8 so I shouldn't expect it to pull like a V-8 when I floor it". What a weenie! But, it was the desk guy, not the mechanic...usually when you get to the mechanic they have a better idea of what is going on.