It's just so hard to project junior players, until they actually arrive in pro hockey. So for Kudryavtsev, it obviously won't be until he arrives in Abbotsford and starts taking a regular shift. But it's the same adjustment whether you're a first round pick like Lekerimakki or a third round pick like D-Petey.
But so far, the fact that he's earned the respect of OHL coaches and has already signed a contract with the Canucks, means that he's far exceeded the expectations for most 7th round draft picks.
I don't know the percentages of 7th round picks who even play a single game in the NHL. But surely it has to be under five percent.