NDCube games are very formulaic, though, and even though they are a commercial success, they are rarely critically acclaimed.
Retro Studio games, on the other hand, have been
at worst, flawed classics and, most of the time, masterpieces in their genre. This also holds true for Monolith, who are also routinely helping internal EPD teams with their project (as do 1UP Studio).
However, unlike NDCube, Monolit, and 1UP (and IntSys and HAL), Retro has indeed been hemorrhaging talents since its inception, and they haven't released a new game in a decade.
So, I don't think it's a black-and-white situation. I agree with you that "most talented and recognizable team" is a hyperbolic statement (and as
@MaitreWakou said, one that holds only on Western message boards -- the general gaming population couldn't care less about Retro, and I'm sure they are hardly recognizable by the Japanese fandom). But at the same time, Retro is definitely not a random B-tier team for Nintendo. Granted, if Metroid Prime 4 will not be successful (at least critically), things may change.