i'll tell you a couple of things nobody ever mentions about these hig runs.....
1) if you're not in a tournament or playing an opponent (who is racking), one could easily, without anybody noticing, fudge the rack a tad (high or low) so as to be able to continue a perhaps ending run. people say, awe, who cares, but this really is a big deal. and this could be especially true on the video "proof" that we see nowadays.
2) high runs are silly in a way. the guy gets WAY out of line at say 300, fires at a bank, combo-kiss, it happens to go and he runs 100 more. The point is, there is nothing "real" behind these runs, the guy just fires at everything like when somebody plays the ghost. Further, if runs are continued on shots that a guy would never shoot in a real match, what does it mean? And how much is luck a part of it? Strait pool is normally played to 150 or perhaps 200 anyway.
When it comes to "high runs", why don't we measure greatness the way it shoud be is my point, by the guy who manages to put together the most 150's in tournament (or other meaningful) play (eg Sigel gets my vote by the way).