Think my breakdown was:
Ind/NY RC - 1 in about 150-200 games (beginners luck i guess? almost all +1 games, just started then, think i ended up with 300 points)
Mav/Sun - 7 in about 5000 games (+3 and +5 games)
OKC/Sea - 7 in about 7000 games (almost all +5 except when i clicked on the wrong one by mistake sometimes)
Non-RC 5 in about 7000 games so far (1 between first RC and 2nd, 2 between 2nd, and 2 recently). For whatever reason i also seem to get more Rare+ cards during RC than QG. 10:1 energy rate vs 5:1 HS rate (reason every by week, i stock up like 150 energy from just playing QGs)