Depends how you measure "performance".

I've often made the case that loads of coins surpassed Dash's cap in the past - including the likes of NEM, FCT etc.

The problem is they didn't sustain it because most are subject to speculative pumps. So ending the year on the price it's at is amazing performance for a 3 year old coin. (In fact just still "being around' is good performance).

Another good example is Monero. It got the a*ss pumped out of it recently, not because it was a great long term investment but because some opportunists saw major competition on the horizon and decided to use a couple of "news items" to launch a market feeding frenzy on its only significant exchange. Problem there is that the last of that "news feed" is about to run out in a few days and get sold off (which is why you're all here desperately fudding Dash as it's starting to rise again).

I'm sure XMR will be milked for all it's worth before then though and as much BTC fleeced from willing noobs as humanly poss. Parr for the course