I have no problem with the argument that Virtanen has low Hockey IQ; there's a reason he was part of "the rest" when it came to the draft despite scoring 45 goals as a 17-year-old with less than prime minutes. It's just that whenever Iridescent posts about Virtanen, he makes it sound like he believes the kid is incredibly stupid, full stop.
Unfortunately I'm not quite able to give what you're asking. I mean, even if in a hypothetical scenario I knew him and his peers enough to evaluate such a thing, intelligence is a heavily subjective topic. Different people will define it differently, have varying opinions on degrees of intelligence where they define it similarly, and it's really not quantifiable. What I will say is this.
I honestly believe the single most important factor which separates a legit top line player with all the tools from a bottom 6 player with all the tools is intelligence. Why does one guy with all the tools flourish, and another bust? Most times, in my opinion, it's due to intelligence.
I think the single most overlooked factor when drafting is intelligence. Look at Subban. Guy is easily a Mensa level intellect. He's brilliant. Overlooked because of physical/attitude deficiencies and nobody paid much attention to his strong mind. Look where he is now.
To me intelligence absolutely needs to be placed alongside physical tools when selecting prospects. Not as an end all be all, but if you got a guy coming in who clearly colors outside the lines despite having great tools, there should be some hesitation at drafting him early.
That's the best I can give ya on it unfortunately.