Martelo I understand you point, but I think in this case the guy started it.
he lifts his head up and half laughing/half annoyed, says something like "You are going to give me a complex if you don't cum soon.
If I were to let a woman give me a BJ and she said that, I would reply with 'well your going to have a complex then and pull her up.'
Now if we were kissing and talking and teasing and I told her to 'shut up and put your mouth to good use allready' while pushing her down, that could be offensive. Though if done in good spirit she may very well appreciate it too.
I think when you are giving oral, you are giving, and the expectaion of some sort of time constraint or control over their own response takes away the point of the gift.