Pretty much. Stamina was devalued enough for cata that it was no longer the "STACK THIS STAT ONLY" like it was in WOTLK as was ArP for other classes. Instead it changed to "Get CTC then stam stack" but due to gear, whilst sure you could hit CTC in T11 in full BiS gear (just about) you had to sacrifice a lot of hp. In firelands, any mediocre geared raiding tank would be CTC and starting to get some stamina but most of that would still be in Stamina/Master(or parry) gems rather than straight stamina.
In DS numbers are now high enough that in good gear you will be CTC even before placing any gems if you're really well geared so start putting in some stamina ones as that is the next best stat in terms of keeping us alive ^^
A fair few people ditch Windwalk at this point and go for Landslide. With the debuff now you may as well do this, especially if you're going for hit/expertise cap which once very well geared is worth doing. However, by the time that using Landslide is probably a good idea, you won't need to ask questions, you'll just know