I agree that the Leafs cannot be compared against teams you mentioned but with that said you cannot say anything wrong of them on how they are playing. I guess we will find out more as the season goes on.
One thing is for certain, if they can continue to gel like they have been. Find line combinations that can work well together, come playoff time that will only bode well for them. The 3rd line of Hyman-Engvall-Micheyev look like the real deal. Once Simmonds comes back that adds another dimension that we havent had in past playoffs. Imagine him on the 4th line with Boyd-Spezza and how they have been playing?
We may have 2 lines that are capable of playing the cycle game very well with our 3rd and 4th lines. Not to mention the size and speed they bring.
So we may not be that far off from contending with the teams you mentioned. On top of that I dont think other then maybe Boston and Tampa Bay, no one can ice 4 players in their top 6 like Matthews, Marner, Tavares, and Nylander. If the Leafs can continue to build their momentum, I dont know if there is any team that can stop them once playoff time comes.