This is true, but doesn't actually contradict the guy you quoted. The forces applied to the cap and bottle when using a wing capper are far more likely to result in this kind of failure than when using a bench capper. Using the bottle repeatedly for 12+ years probably did weaken it, but I can pretty much guarantee that it would not have broken like that (within the same timeframe, anyways) had he used a bench capper.
Not only that, but had he used a bench capper the entire time, I can also pretty much guarantee that it wouldn't have been so severely weakened; assuming the failure WAS the result of "built up" weakness due to repeated capping, then I can similarly assure you that even if he used a wing capper this one particular time anyways, it wouldn't have broken like that had he been using a bench capper up until then, as it wouldn't have been nearly so weakened.