Most of the simulator programs that the stores use can be screwed with... There are two golftowns (like golf galaxy but Canadian) where I live, you could go to one hit a driver 250 then go to the other and hit 300. I am friends with some one who works there, watch them touch the screen while they setup the simulator, there is often a scale that they touch, the higher on the scale the straighter and farther the drives will be.
Quick funny story for those interested. I go to my local golf town (one that really likes to screw with the results, and the one my friend works at, and one I know how to put the simulator back to normal) to try out equipment, not to buy just to try (you know you do it too). I work at a local golf course's pro-shop so I do sell a bit of equipment, properly I might add, and I sold this guy a S91 driver last year, trust me it was the right driver for him 12.5* launch angle 3400 rpm (I record all the fittings on my computer) perfect ball flight and very acceptably consistent for his handicap. As I walk in the store I see the guy trying out a driver in the simulator, I wait for the sales rep to walk away to ask him what he was doing, and he says "look this rapture V2 goes 60 yds further than that S91 YOU sold me and it is so much straighter, you screwed me." My response was taking the driver out of his hands and hitting one into the simulator "Carry 343 356 total" (I hit 280 max on a really good drive), the guy had seen me hit balls at our range before and he knows I can't actually hit it that far... The guy very quickly walked out of the store, he know only buys equipment from me (which is good because he is an equipment nut, he changes sets more often than he plays).