Well for this guy, bodyweight is a tool. If he lost 40 pounds, his deadlift would probably go up 20-30 pounds without him getting any stronger. That would put him around 2.6x for a triple. A 200 pounder doing 520x3 I think would be outstanding.
I don't think that you can compare strength between guys of different weight by dividing by bodyweight. In some lifts, you have to move your bodyweight and in others you don't.
Also, a 300 pound guy with a 30 inch vertical impresses me more than a 150 pound guy with a 30 inch vertical. The 300 pound guy is twice the force on the field as the 150 pounder.