Did I actually earn it?

For some context, i’m 19, and have have been training for 2 years. Prior to bjj, I did wrestling, track, and football throughout hs. After a little under a year of training, I got my blue belt. Felt right, I was able to tap blue belts often and hold my own. Just a few weeks ago, I got promoted to purple.(Yippie!) Once again, I can tap most of the purple belts, except a couple of dudes who have significant size on me(I weigh 160). It just feels super quick?