Well... yes...Guess that puts that argument to rest, all the Netflix characters are canon. It was so obvious anyways that its silly to think they weren't the same characters from the same universe. I mean at the very least you have to expect the Multiverse explanation would be at play if they aren't the same exact versions of the characters from Netflix.
Except, we know Feige didn't like what Marvel TV did. And this is comic book world, anything can be retconned or explained away. So, if it doesn't turn out that way, I won't be surprised.
But it does seem that at least Netflix Daredevil is MCU canon.