That's one way to look at it.
Another way is that he was the 36th pick in the draft (pretty high), had a good career at South Carolina, and runs in the 4.48x range at a compact 214 pounds. What he's showing in the preseason and practices is just an extension of a pattern that stretches back years. Moreover, that these flashes of athletic talent were shown against scrubs doesn't necessarily diminish the existence of the underlying tools. For example, just because Tyreek Hill was playing against amateurs in college doesn't mean he wasn't actually fast. In other words, the tools on display are real, even if the competition is not. Also, any time you are projecting an unproven prospect to the next level, it's understood that the level of competition will be higher. That said, even "scrubs" playing in the 3rd quarter of a preseason game are better than the average SEC player.
I am here on a mission to preach the gospel of Deebo and encourage people to open their hearts and accept their new lord and savior before judgment day comes and he's suddenly commanding huge dynasty asking prices, but ultimately we all have free will in this matter and if you want to dig your heels in and be wrong then you are welcome to do so.