How the heck everybody has a Tyranitar

Is it only me or what is going on?
I mean, i have not a single larvitar.. no need to talk about the tRex..
During the first hours of adventure week i saw a few on the - one and only- pokestop in town. Which is placed on a graveyard. I live in Germany. It was 11pm.

Never the less somehow a lot of dudes in gyms around me managed to get their. tyranitar. And you guys here around (with questions and Screenshots) seem to have them as well.

Are there nests? I mean come on.. i think most of the days i Play effective (moving thru pokestops or at least some spawnpoints) 15-60min..got Not a single larvitar.. How is it possible? Any other frequently players without one?