Timelord is a bx tag hung by the media for his faulty alarm clock. I think Lob is what he was called in Texas--he catches the lob pass a foot above the basket and dunks it. He's done it a few times in Boston, but hasn't played enough minutes to tag any labels on the court.
I see from the tweets there are a lot of fans who would like to see him play more minutes. The sportswriters seem to be avoiding the issue, but it's obvious they need somebody of his talents to neutralize those bigs who are killing them in the paint.