As a sidenote, Stephen is also the author/maintainer of "What I Wish I Knew When I Was Learning Haskell"[0] which is a great resource both for those who are learning and for slightly advanced programmers.
No, it doesn't imply that, at all. My least favorite thing on the Internet nowadays are shallow fault-finding comments like yours from people who just want to interject themselves into discussions where they have nothing substantive to say. I used to be that guy and still have to actively resist the temptation. Don't be that guy.
Oh, man — not being that guy, at least in the fault-finding sense; just apparently failing to make an obvious joke. Very strictly, grammatically speaking, it does say that, and it was a humorous implication to me, since I have known so many programmers who apparently did stop learning once they were very slightly advanced. But I'm completely aware that the implication was accidental.
[0] http://dev.stephendiehl.com/hask/