Weirdness with sixes

Lately, I've been seeing a lot of games where either I or (more often) my opponent gets a very high number of sixes. I suppose by posting this I'll be encouraging others to think the random numbers are borked. Actually, I doubt that. But it still makes the game somewhat frustrating. I just finished one game where my opponent kicked off the game with a four, then got 2 fives, and in his remaining 22 moves, got 12 sixes.

That is very odd...

I am beginning to think that the rolls are not as random as they seem...