How visible is a WPS attack with reaver?

I have been trying to find an answer to this but the search terms seem to be to ambiguous.

I am attempting to determine from a strategic standpoint how intelligent it is to use reaver.

From a speed standpoint it seems to be infinitely quicker than Aircrack assuming that the WPS exploit is available. From a visiblitiy standpoint though it seems Aircrack is the way to go.

I can grab the 4 way handshake in a matter of seconds then go back to some deep dark hole to brute force it on a power machine. Whereas reaver needs access to the AP which I can only assume means it's making network noise. Common sense would dictate that the more network noise there is the worse off you are.

I can't find anything on this though confirming my theory. Anyone have insight?