Hi terbal,
We agree that is stretching the realism a bit, but also consider that this amazing feat has only been accomplished one time from one player from the Master tees and is not the norm. The players who shoot those kind of scores are very few and far between and they don't accurately represent the play of the average WGT user.
Unfortunately, like most video games there will always be those few who absolutely destroy the curve, but if you take a look at the typical Pro & Master tier single-play tournament scores I think you'll find that they are mostly within the realm of being reasonable.