I would say he has if you include the wjc. If not, then you're right, it's a wash. I think Bedard's playoffs are stunted a bit because his team was significantly worse than the Erie Otters roster McDavid played with. He performed very well with what he had but it's hard to say whether he would've maintained that level since they were out in the first round.
It may be true that McDavid's skating helps him create offense in a more reliable fashion than Bedard's approach but I don't think Bedard's weapons will take too long to translate. Crosby isn't the skater McDavid is but his skills translated very quickly to the league. Bedard is somewhat similar to Crosby as far as physique goes so it may be the same for him. He has very good positioning, extremely high iq/anticipation.
I do have pretty high expectations so I think 90 is in play if he stays healthy but there are definitely reasonable questions that will have to be answered if he's going to do so. My thing is that generational players usually hit the ground running so if he's on the same level as a crosby or mcdavid, it's very possible. But we'll just have to see how things play out.