The comparisons you made were between two fighters that actually fought each other. We have a much clearer picture of where Velasquez is at on a Lesnar - JDS scale, so that argument doesn't hold any water (although both of the statements you made were true, so you weren't even disproving what you thought I was saying
).
Never once did I say anything about him not being good because he hasn't beaten anybody good. Just that no matter how impressive a guy looks against Charlie Brenneman it doesn't tell you much.
Rory MacDonald nearly beat the current interim champ before his 21st birthday, while Silva has yet to beat even a mediocre UFC fighter and he's 28.