Forgetting the question of whether or not anyone should actually be surprised, one the reasons the Toronto Maple Leafs have given such fits to the #1 seed is the play of rookie Auston Matthews.
Matthews led the NHL in 5v5 goals this season, is a shoe-in to win the Calder Trophy and the only player he had less goals in total than was Sidney Crosby (who he most likely will be matched up against in the second round).
So, it shouldn’t surprise anyone that Matthews is perhaps the best player in a series that features Alex Ovechkin, even if he is just 19.