Snowballing out of control

Out of my last 10 games:

3 had pre 20 min surrenders 4 had post 20 min surrenders 2 had team ahead snowballed to win without losing their lead, but had no successful ff vote (aka "normal game")

JUST ONE had a comeback from a 1000+ team gold deficit

I don't even feel like 1000 team gold is THAT much as it is often gained between 5-10 minutes after first blood and there are small CS leads