I have a few theories on why my quad seperation is good.
1. My quads are one of my better body parts. And Generally, a bigger muscle POPS out more, so it looks more defined. Look at professional bodybuilders, although a lot of them get kinda fat in the offseason, there muscles are so huge, they look leaner then they really are. Just an illusion!
2. There have been some studies that shown (and no im not a complete believer in this) that muscle group that were worked extremely repetitively have better fat oxidation then other muscle groups.
In my case, I rowed on a crew team competitively for 4 years. Our seasons would last from November-June. And then I would do rowing camps in the summer sometimes as well. To give you an idea what rowing is like, look at the ergonomic rowing machines (cardio equipment) at your gym. Yes, you're pulling with your arms and back, but its honestly MOSTLY in your legs. It's like doing a leg press, THOUSANDS of times.
Before I even started bodybuilding I rowed.
A typical practice we would row, 8-10,000 kilometers. We would row an average of 30 strokes per minute, and it would take us about 7.5 minutes to do 2,000 kilometers. Thats an average of 1,125 strokes in a practice. THATS ONE PRACTICE!!! All those leg presses!! Now, imagine doing that for four years...
It may be all Bull shit, Im not sure. It may be complete coincidence, that my quads come in before other muscle groups. Or it could have to do with better fat oxidation, because of my past. Who knows! lol
Either way, I wish it would do the same for my glutes and hams!