Don't have time to elaborate but
1. Playing a round in under 3hrs while racing around or telling a story about your fastest ever round proves or means what exactly? Was someone saying that a under 3 or under 2 hr round can't be done? I don't get the point.
2. Golf takes a long time if you are seriously competing or even trying to shoot a score, ie. maybe looking at some putts from the other side of the hole, testing wind, getting an exact yardage. Making the argument you play better when rushing around and not thinking about what you are doing is a fallacy and maybe has happened once, similar to the argument you play faster walking than in a cart, maybe possible on very very few courses but by no means the norm.
3. If playing seriously the length of time the round takes is more determined by the layout, acreage, elevation, green speed, etc .. of the property, than the actual golfer or golfers.
4. If you are playing a good golf course you are seeing for the first time and are worried about how fast you get around then have at it if that is your thing; I personally like to enjoy the expierence and at least attempt to play well, I somehow think I am in the majority with that opinion.