James,
It is irrelevant when the Captain decided to hit the GO button, so long as he decided TO Go around averting a dangerous situation.
Proper AVIATING is all about PROPER decisions. An IMPROPER decision would have been slamming her on, throwing out every anchoring device, and hoping in God and Goodyear. When you start chopping down HIAL with the nosewheel, you know you made the wrong decision. Factor in that the runway was slick, and stopping distance is increased SIGNIFICANTLY.
Without knowing WHY the decision was made to abort and go around, you cannot comment. SHould he have gone around earlier? Maybe, but the decision was made to continue, and THEN go around upon making a decision that the situation had potential for problems.