No. There's some context involved in the NCAA. He had a...pedestrian...1st half of the season for a generational prospect from a counting stat standpoint which impacts the overall picture. There's been some work done by people who track NCAA hockey on what his chance generation and on ice shooting percentages were during that stretch and he was a combination of a historic level chance generator, and cosmically unlucky in the 1st half (the work I've seen suggests that he was sitting at about a 5% on ice shooting percentage, when a typical number is around 11%...as in, for every 9 shots taken when a player is on the ice, 1 goes in. McKenna was 20 to 1 in the 1st half...so fewer goals to accrue points on). But that all regressed in the 2nd half where his chance generation went fucking nuclear, and his point generation in the 2nd half, if extrapolated over the entire season would he as good as any freshman ever.
For the WHL, yes, depending on how you slice age groups, McKenna was historic. Include the OHL and the only 16 yr old better was Gretzky. The only 17 yr olds better than McKenna's 16 yr old WHL season are McDavid and Lindros. The Q doesn't count imo, but only Crosby is the only one worth adding to the conversation.