Is it just me or that comment seems planted to get that response? I don't get why is there a random reference to Ravi Vakil who has nothing to do with the context of that conversation. And if you want to cite for academic accomplishment, you can cite someone known much more widely. I find it much less iconic due to that.
That still does not make it relevant. Saying to some random stranger on the internet who claims to be bold that he is not bolder than your cousin and quoting a specific accomplishment just feels too much like one knows that the accomplishment is common to both and invites the now famous reply by Colin.
Don't get me wrong, Ravi being your cousin adds a lot of context and makes it much easier to understand why. But still makes the comment much less iconic for me.