You need to learn the importance, or rather, the extreme lack of importance of internet claims.
Maybe you're a weekend warrior, maybe a daily diehard, maybe you can turn a clean 27, maybe a clean 28's the best you'll get.
What I can tell you is this - If you want to go around making claims to be a "Ringmaster" and as good as anyone, you're going to get laughed at without proof.
Even in cases like this where you have a lap time, a "Ringmaster" can drive more than 550PP cars on RS at the Ring.
A Ringmaster can drive an Enzo on CS at the Ring, and Daihatsu on CH, and a SuperGT on RH's, LMP's, etc etc.
Lose some arrogance, gain some practice, lose the chip on the shoulder, and stop making claims you cannot prove. Not because they are or aren't true, because nobody gives a damn what a random kid on the internet says unless he has proof.
That's just the way it is.
I'm glad you came through though, I'd even like to join some of your rooms running some Nurburgring laps (Fast Nurb diehards aren't that easy to find) but it'd be most awesome if we could race enjoyable combos at the Ring eventually too.
Once you learn cars on lesser tires, you'll never go back.
Edit: Oh, and if you want to see how your Nurburgring skills are compared to the absolute best, I'm sure
this has already been suggested.