Don't call this complete confirmation, but i also read that Arthur was visited by several coaches; stoops, carroll, NU's DC Cozgrove... Many of the big time schools. Also heard Prince knew about it, and sent at least one coach (didn't hear who) as he had a prior commitment. I'f I find something concrete I'll post it for ya.
Also, he's th #1 linebacker, but is he #1 overall? Maybe I saw a different list.