"So does this mean the Canadian Chinook pilots have to slow down to keep on par with the slower 'armed' escort? Bet they will love that being in the area longer than they need be just so their escort can keep up."
There are ways and means of getting round this issue - different ways of escorting helo packages dependant on type, terrain & threat. Just not for discussion on an open forum.
AH-1Z...yes, that'll do it or maybe UH-1Y (if the USMC ever get it to work).