Founder
You remind us of a good point about the change in pitch with adding power with underwing engines vs. the lack of change with tail mounted engines.
I have flown both the 737 and the DC9. There is a pitch change on the 737 when you add power or reduce power. This is one of the reasons I can't stand the 737. It is also one of the reasons I love the DC9. It is a much purer form of flying with the tail mounted engines. To borrow a phrase / title, you more closely "FLY THE WING" on a plane like the DC9.