Read what you just said. On the one hand you tell me that he ran a 4.42, then immediately say he ran a 4.3 in HS. That doesn’t make sense. I’m guessing that “4.3” was hand timed by a coach who had every incentive to get his kid an offer. And if you think GP offered him because of that one stat, you’re crazy.
The more salient question is whether a 4.42 is close to a 4.3. Frankly, the answer is no. At last year’s draft, 21 players ran a 4.42 or better. Add another dozen guys if you extend that up to 4.45.
To contrast, only 5 ran better than 4.40, and two of those were at 4.35 or higher. So true 4.3 speed? Only two guys in last year’s combine had it (3 if you count the guy who ran 4.31). So no, 4.42 and 4.3 are not even in the same league.