Memory is that the 727 had the most noticeable lag. You'd rotate and it would sit there 'yeah, what do you want me to do now?' and then it would say 'ok, I'll fly'.
737 has it also. Guys ask what a 727 flew like - a 737NG with derated 22K.
Don't recall it on the 767.
Like sevenstroke said - why's it do that? Because it's cool.
