The problem with design studios this large, and operating on this consultatory premise, is that they will never get to influence the business "why" of solving a problem - they will always be handed a brief, and will always have their solution bounded by decisions made prior to their involvement. They are compelled to do work on what someone else has determined to be the problem, not to uncover the problem themselves and work outwardly from there.
You actually see this all the time in finance - there are entire companies built around the idea of churning out datagrid UIs to banks that don't ever stop to consider the real underlying conditions of why a process is the way it is, or have the opportunity to change it. It just results in a lot of same-same being generated over and over again, and it's easy money for consulting groups to get into the biz - just buy a small (or several) design shop and start billing yourself as being in tune with "UX." Deloitte, KPMG, MarkIt On Demand, EY, PWC, Accenture, EMC, and a bunch of other places are doing it just that way.
There are design guidelines and even some base templates and sass files and such to keep things looking somewhat similar.
nfriendly, your experience is what it's like working with a non-IBM Design team. The old way is to have a single designer on something and that person has little to no authority to be the users through the design process. That's all changing now.
From my understanding, there have only been a couple of hundred products (in the 3 years since IBM Design was created) that have been updated using IBM Design Thinking. There is actually a dedicated design team (min 5 designers) working on each product that is getting attention at that moment in time.
But there are over 5000 products that IBM sells, so it's going to take a while to get to them all (also assuming some of these will be consolidated as the design cycles address the user's needs). There will be a lot of time that passes before all the engineers at IBM (with it's 400K+ employees) get to have a dedicated design team on their product.
Having been a number of startups and advertising agencies before this, the "design culture" is strong here with a lot of smart folks fighting to turn around a very very big ship.
I get the feeling adding designers to a project has the same startup costs as hiring new programs with the results of crappy sorta conforming to the theme design being just as noticeable.
IMO, "does it work?" is a QA question. The design question would be "does it do anything useful?"
And their biggest problem isn't design.
It is their culture, and I would argue a lack of focus and direction.