I have no idea who they are in real life, so I can't say.

The deleted comment was not written by any of them.

I just saw this and don't know the context, but I've been at Google since Jan 2009, so almost 4 years now. Assuming mdwelsh is Matt Welsh, he started his sabbatical in June 2010 and left Harvard full-time in Nov 2010. Cletus started right around then as well.