I was thinking its a 3/4 too. Because his temples are very thin, I don't think he would take a chance wearing toppik and performing, due to the risk of it running.

Also he wears alot of caps and hats. So I think thats why he has gone for this style. With my current style (spikey) I can't wear a hat, because it messes up the style. But I am considering something like this for a 3/4 size and keeping some of my own hair at the nape.