I always find this kind of discussion to be an entertaining one. For a lot of people there seems to be some real "pride" to be found in having soloed with less time than someone else. I'm hardly the grizzled veteran of aviation, but I always try to tell new people not to get obsessed with these numbers (as so many folks do). In many ways it is largely meaningless, as weather conditions and scheduling could have played a significant role for a lot of pilots. Plus, where you start in aviation is less important than where you end up!
I think one of the reasons pilots get obsessed with these numbers is that they want a somewhat quantifiable way to measure their performance relative to their peers. But, we're all wet behind the ears when we start, regardless of whether we solo at 7 hours or 17 hours (or more, or less). If you really aren't proficient as compared to your peers, you'll know it eventually. There was a woman at my flight school when I started who had logged something like 96 hours without being signed off to solo (it wasn't a medical or an age issue, either). Her dream was to get to the point where she could solo, and I doubt she really even had much intention of finishing her PP license… I want to say that she did finally get there, but I can't honestly remember for sure.
I had a discussion with a pilot recently who told me that he soloed after just 3-point-something hours. Now, maybe he had an instructor brave enough to sign him off that quickly, and maybe he was an aviation god, but I couldn't help but think that I sure wouldn't have wanted to solo that soon.
I just double checked my logbook to see where I was at when I first soloed (because I couldn't even remember). I thought I was at 11.9 hours, and it turns out that I was at 13.9 hours. Does finding out it was different make any difference at all? Nope! Before my solo I show that I logged 12 total flights, mostly short ones, and two sessions in our flight school's simulator. We did 48 landings prior to the flight in which I soloed, and I spent 1.2 hours under the hood during those initial flights.
Incidentally, when I came back to aviation again (after a nearly 14 year break) I flew 5.7 hours over four flights before the instructor signed off my BFR. He would have signed it off a flight earlier if I was comfortable with it, and even after he signed me off I decided to take him along for an additional flight before I started going on my own again.