NotOpie
"Puck don't lie"
I don't know where you're getting this from but it's absolutely not true.
Provorov has been regarded by many as being the most NHL ready d-man in the draft. He could play in the NHL next year and will undoubtedly be in the league his second year post-draft. Werenski seems like he'd take the longest of the three because of how raw he is but I'd still say two years for him.
I think we've all read competing reports good and bad about Hanifin, Provorov (okay, no real bad ones here), and Werenski. We've also read about how long it takes for blueliners to get ready for the rigors of the NHL. Perhaps they exceed the typical timetable, but I would never count on it.
My point still remains, give me the forward prospect 1st as I believe they will have earlier impact.