Well Sir George Martin said "He's not a technical drummer. Men like Buddy Rich and Gene Krupa would run circles around him".
Buddy Rich said "Ringo was adequate. No more than that."
Ringo himself said: "I became a drummer because it's the only thing I could do. But whenever I hear another drummer, I know I'm no good.....I'm not good on the technical things, but I'm good with all the motions, swinging my head, like."
So I guess whatever they are talking about.
I like what these guys had to say about it