pax,
The poll has been answered by people in all stages of their shooting "careers". From very experienced to brand new shooters.
If anything, the more experienced shooters are more likely to respond for the bragging rights. When you take that into account and also consider that this board is made up of shooting enthusiasts and that this only measures the round count on a person's favorite or most used handgun, the numbers are, if anything, conservative. (If the poll indicates that 60% of all shooters will shoot less than 10K rounds, then the real number is almost certainly much higher.)
To answer your comment about your progression into your shooting career you have to look at it this way.
If I reposted this poll in a few years (when you have now shot 50K rounds or so) then the overall response will be virtually identical but different people will be making up those responses. Everyone who's still here and still shooting will have moved up a bit. Some will have left, some will have died, some will have given up shooting, but to take their place, there will be new members who are, once again, covering the same spread of stages in their shooting careers.
In order for time to change the results of the poll, the actual makeup of the board would have to change. Shooters (on the whole) would have to be significantly older, shooting significantly more, owning significantly fewer handguns, etc.
I've been watching the results and recalculating the percentages periodically, and we're now to over 180 responses. However, the numbers (percentages) I've posted from when there were only about 100 responses aren't significantly different from what they are now. That means that nearly doubling the responses didn't change the actual results of the poll. Pretty good indication that what we have is a good slice of what THR members are doing RIGHT NOW.
If we can assume that the overall demographics of THR members don't change much over time and that other factors don't significantly impact the availability of guns and ammunition or the use of those guns and ammunition then the numbers from the poll should be good for a long time. And that's in spite of the fact that the person who posts 20K rounds today will be posting 70K rounds in 10 years--because someone posting 500 rounds today will be posting 20K rounds to replace that person's response and someone who's not even a member today will be posting 500 rounds to replace that response, and so on...
NOW, on the other hand, if tomorrow, an ammo tax were instituted that drove the price of ammunition by $50 a box, then we could expect that in another decade, a similar poll would reflect significantly different results. You'd still have some of the same folks posting roughly the same numbers, you'd have the losses, but the newer folks would probably never come close to matching the shooting volume of people who did most of their shooting when practice ammo was widely available for only a dime or two a round.