[For some reason, I can't post a comment on the original blog, so I'll put it here]
I've rarely cum from a blowjob (the last time was two years ago, with my husband's ex blowing me while simultaneously playing with my ass - an effective combination). I require patience and a good technique, and the men who've blown me lacked the required skills. My husband will start to blow me, and it feels pretty good - but after about two minutes, complains his jaw is locking, which leaves me frustrated.
On the other hand, I am very proud of my cocksucking and deep-throating skills, and have only rarely found a man who didn't cum from my service. My husband was one who claimed he never got off from a blowjob, but I converted him quickly (the best part being that he starts leaking cum well before he orgasms).
My most challenging (and regular) top was a man who liked to deliberately hold off as long as he could, while being fairly merciless in ramming my throat. I don't often gag, but he enjoyed it when I did, so I had to fake it a bit. And my best group scene was in a hot tub at the Russian River - 7 men sitting around in a circle as, one by one, I polished them off. Good times, good times...