My wife generally did not have orgasm difficulties (at least with me). Neither did my first wife (until after our son was born and then her orgasm was less 'reliable.' Although our sex lfe fell off dramatically and her ability to orgasm seemed to go away or be less reliable, there were also times when the sexual intensity from her was "bi-polar" which I attribute to other factors including hormonal issues).
OTOH, I've always been willing to take the time to sexually stimulate and attempt satisfy my sexual partners (that has not always been successful, mind you) rather than jumping to the main course. Short (in time) and intense sessions have occurred far less frequently in sexual sessions than long, lazy, multiple-orgasmic lovemaking (multiples for both her and I).
That is not to say that there hasn't been occasional difficulty in her achieving orgasm, but it generally was not THE problem. Rather it has seemed to be more of an issue of generating interest and energy.
Although I have had relatively few experiences where the woman does not experience orgasm at some time during the encounter, I also know the frustration of feeling like being sexually involved with me just is not any fun (I'd rather watch QVC) and that sex is more like a form of abuse rather than real intimacy.
The Captain
Last sex: 04/06/1997 Last attempt: 11/11/1997 W Issues "No Means No" Declaration: 11/11/1997 W chooses to terminate sex 05/1998 I gained 60, then lost 85 pounds. Start running again (marathons)