Oh yeah without a doubt. Those times when I put in all the effort to get there, both her and I would end up with genitals that are red raw. Like I said, having to spend 30 mins or whatever... I have no idea how long exactly but it felt like an eternity and a real chore... pounding away just to get that shot off really sucks.
Agree with other posters, it is far more enjoyable to go with the flow and cum in a reasonable time.