Could be... but they've shown they're still willing to pay him as an amateur.
I've said it before even after seeing the draft projections and all that. I don't think he's ready. I think there's a risk that his draft position will fall once teams take a microscope level view at his game. He's fast. But he's not faking guys out of their shoes or running physical like Velus did. A lot of his TDs were because he was schemed open rather than him running a great route or getting off physical coverage.
Ultimately though, this comes down to what he values and what he believes his risk/reward to be. The NFL money would be hard to walk away from. But I witnessed from a fairly close position Heath Shuler's decision to leave early and the ultimate impact it had on his NFL career. Maybe another year of development and maturity wouldn't have made the difference. But a guy with his physical talent was eventually sank because he wasn't ready mentally or emotionally.