Interesting! What sources are they hearing that from? DraftExpress and Chad Ford, the two most accurate mock drafts, have him mid to late second round. NBA Draft.net has him late first, but they're not as accurate usually.
DraftExpress is awful at accuracy a few years back they thought Klay Thompson was not a lottery pic but a mid to late first. Klay was a dead eye shooter with suspect handles and his defense wasn't that great. They thought Alec Burke was a much better player.
As we can now see Klay has worked on his defense and handles. If Buddy finishes strong at the end of the year he should go. Isaiah once he shows consistency throughout and control his temper he will also go to the next level.
It would be good to see him play without Buddy and see how he can lead the team. I hate saying in some aspects because I like watching them play together.