Ok, I crunched some numbers...
The average player here hits his driver an average distance of 262.9 yards.
The average single digit or lower player here hits it 277.9
The average double digit hits it 244.2
The average PGA tour player, who's handicap is around +5, hits it 287.9
So, the best players on the planet, with the most sound fundamentals and athletic prowess can only hit it 10 yards farther than us?

Or, is it possible, we are fooling ourselves... You choose.
The problem is, many people assume that the hole measurement is accurate, ok, so it's a 400 yard par 4, and I have 120 left after my drive, so I hit it 270, right? Wrong! Those numbers are not measured straight, and they are rarely accurate. To get a true average driving distance, you must measure every drive you hit during a round with a GPS, then average the distances. You will be amazed. The Tour measures drives with extremely sensitive, expensive equipment, and keeps meticulous records. We don't, and most of us are merely kidding ourselves.
When I go out and play with an average 10 handicapper with a good, solid swing, I find they drive the ball around 225 yards. I've played with a few guys who were considered the longest hitters on the course, and just blew every drive a mile out there. I measured their drives around 265-275.