When you can toe-press 1,000 pounds for 6 reps, a 405 squat isn't really that impressive. I've got long legs but pretty good leg genetics. Squatting was something that took me a while to do well. My body isn't made to squat but I do them anyway because they are so essential.
What is much, much more impressive to me is someone who is strong AND in shape. After doing 405 for reps, drop down to 225 and do 10 sets of 10 with one-minute rest in between each set. Look at the clock when you rack the weight each time and get back under the bar in exactly one minute....and those are just the start of a leg workout.