I think that the activities of 14 year olds are almost too diverse to really generalize, but that's just my opinion. In statistical parlance, I would suggest there is a very high standard deviation from the norm. Part of that comes, IMHO, from the different development rates as kids go through puberty. If you take a group of 19 year old guys, most are at a somewhat similar level of development, and by the mid twenties, it seems most guys are through it and they've gone through that "thickening" process to become men. But look at 14 year olds and you get a different picture. Some guys, like Will, are well into it, while others haven't even started. I think that make it harder to standardize.
Quite frankly, I also think it's an issue that gets overlooked. As I mentioned earlier, I think that guys who develop outside the "norm" have challenges, and I'm doing my best to show that with Will (advanced) and ultimately with JJ (who will be late).
Regardless, I do realize that not many 14 year old guys ejaculate while pole dancing at a Roman gay bar. As Sharon noted, this is certainly not your average family.