I think 100+ rounds is adequate sample size. Penny didn't even play 50. And keep in mind his rating is inflated from playing against 2g.
Did flor even play 100+ rounds tho?
Also what makes you think 2G is any worse than GentleMates?
She played 111 rounds.
Also I don't think M8 is that good but VLR was calling them a top 4 EMEA team. And 2G is consensus worst team in Americas. So I think it's pretty clear to me who is better between the two.