Slowing the clock

so I'm playing this guy at 3 min chess blitz.  Beating him easy and I'm thinking "how is this guy 1550 ranking?".  The game progresses...he doesn't resign.  I look at the clock and the guy has 2 minutes more time on his clock.  Now we've been exchanging moves evenly and there's no way he's that far ahead on time.  Anyway I'm a queen and a rook to the good and I lose on time by nearly 2 minutes.  Explains why his ranking is so high compared with his skill level anyways.

so is this a common form of cheating and what can chess.com do about it?

Hugs

Hoof

Winning based on time is still a win, there's no cheating there.  I'm unsure how Chess.com deals with potential Internet lag when starting/stopping clock.

My point is it's more than just 'internet lag'.  I have a pretty good connection and a second of actual time is pretty much reflected in the chess.com clock - however my opponents wasn't.  Some how a second of my opponents clock time was actually taking roughly 1.5 seconds of real time to deduct hence the an overwhelming advantage was gained by my cheating opponent.

Now we are getting somewhere - do go on Urk...