GeneralFap,
I can't say I've noticed the same thing.
In general, the size of a woman's vagina has mostly corresponded to their overall height/size for me. A smaller girl has almost always had a tighter pussy and a taller girl has almost always had a looser one. Biologically it makes the most sense as well.
There are exceptions of course. A woman who has already had a child has likely permanently stretched her vagina to a larger size.
This all being said, it hasn't really made a difference for me. When a woman is too tight, I find it's harder to control my orgasm and make her orgasm first because of it, so sometimes it's more of a hassle pleasing a woman who "feels" better because you need to control yourself more to get her there first -- assuming that's your goal.
- Franco