First, instead of writing:
I'm tempted to flag this "not an answer". I see a huge question:answer ratio
How about this:
Hi Joel, I noticed a lot of questions in your answer, which leans more towards "not an answer". I was thinking you could improve it/avoid it being flagged/downvoted with an  or maybe leave this as a comment so the asker can improve his/her post. Hope this helps!
The 2nd comment is more likely to be taken a bit better by the author, a long time user with a history of large contributions to Stack Overflow, and it looks a lot better for new users who may stumble on the comment, and who might learn something from it.
With that said, I agree with you that this is not an answer. While helpful, the problem is that the question is vague and should most likely be closed as "not a real question". Instead, Joel should have made that a comment seeking clarification, encouraging the asker to make some edits, which would make for a more detailed, solid question that would help future visitors with the same problem.
Lastly, just to clarify, I think you're skills at recognizing a post isn't an answer are solid, just your execution could use a little more delicacy, as most people, even if they make a mistake, have good intentions. Hope this helps! ;)