We tell people this all the time... it's great to hear some riders actually get it!
Now... if we could only get people to stay in the RED (beginner) group for longer, life would be great.
Not to muddy up this thread, but going faster than others in the RED group is not an automatic reason to move to YELLOW (Intermediate).
The best thing people could do for their trackriding "career" is to master the beginner group before asking to bump. Only when you can pass at will - safely and within the rules of the group - should you even think of moving out.
Take the time to learn the nuances of track riding. Learn how to read all the signs of the rider in front of you and use that info to set up your passes.
Learn how to time things. Don't run up on someone slower at the beginning of a no passing area. Time it so you are at your speed (not theirs) at the beginning of the passing zone.
Anywho... the point is to enjoy your time in the RED/Beginner group when you become the big fish. Trust me that the extra time spent there will pay off in you being a safer rider in the other groups - and just maybe.... staying on 2 wheels!