When they post bulk steals for MCW without mentioning he played in gimmick 2-3 zone that encourages steals, that doesn't help credibility. Both Wes Johnson and Dion Waiters posted very impressive defensive numbers, including Drtg in college, and both are consistently(granted Waiters spent only one season, so not much consistency
) worse than average defenders on their teams and they played for pretty bad defensive teams.
On the other hand their conclusion of superiority of Oladipo among prospects doesn't take into account very different roles: Oladipo was a stopper and MCW was most offense and Burke - all the offense their teams created.
Finally, I haven't found how they are collecting their stats.