I'm sure they have usability consultants. And my guess is that they're *not* looking at the user forums.
Usability is *not* just a subjective art, and it's not just a matter of opinion. It really should involve user modeling and testing. Even on a small scale, using a card sort for example, they would not have arrived at the mess that is the adobe user forums.
Take this as an example:
When I go to the new forums, there are 2 places on the page that tell me whether I'm logged in or not. And sometimes these contradict each other! One place tells me I am logged in, while the other place tells me that I'm not. This is really, really basic stuff.
If it really is necessary to have 2 authentication systems running in parallel (which it probably isn't) then it would be essential to very clearly label them.
Something like:
You are logged in to Adobe main site | log out
You are not logged in to the forums | Please log in now or register.
This is just one example, there are others, and many more subtle things that tell me they don't have a usability guy working on this project.