I don't know if he is top 5. I'm a huge fan, but there is still some time to play it out. It's funny, though, the mental gymnastics people are performing to claim he isn't.
On the one hand Beliveau has 10 cups, so he's better than Crosby. The next post, cups are team achievements so you can't really count those for Crosby. The "debatable" Smythes come up, because "stats in the final", yet these are probably the same people who have thought Toews was on Crosby's level the past several years. It's insane.
What you do have is this: 12th fastest to reach 1000 points, in a very low scoring era. In fewer than 800 games is already 77th all time in scoring. In a career with possibly the greatest goal scorer in the history of the game, he has 2 goal scoring titles and is the second highest goal scorer for his time in the league(even with all the missed games). He is 19th all time in playoff points. He has 3 Cups, 2 Smythes, 2 Harts and Pearsons.
What I do know is that when you need to parse and nitpick and frame things certain ways in order to discredit him as top 5, it suggests to me the case is a lot stronger than some would like to admit.