"Has the unown spawn rate been subtly increased?"

#PokemonGO: Where I live has a city-wide scanner, and between gen 2's release and last Friday we had seen a total of 12 unown.Since Friday, we've had an additional 5, taking the total number to 17. That's almost 1/3 of the spawns since gen2 coming in the last 3 days.Has anyone else with large-scale scanners noticed an increase in the spawn rate, or has RNGesus just paid a visit to my city over the weekend?edit: I realize RNG is the most likely scenario, but it's worth asking because if everyone assumes it's RNG then we could miss something via /r/TheSilphRoad http://ift.tt/2pwVvkQ