Triskavanski brings up an interesting point on teamwork with the surgery example. While the main surgeon is working, assistants are passing tool, clamping veins and arteries, and providing suction so the surgeon can see what they are doing. In fact, many surgeons would say their work is impossible with out the assistants of good nurses. However, instead of claiming team work, another way to look at this is it's the minimum requirement to avoiding penalties. The surgeon isn't getting a team work bonus from assistants, they are avoiding poor condition penalties because a properly staffed surgery theatre is part of what the rules consider adequate tools for the job. A street doc may have all the best equipment, but still suffer a penalty because they don't have trained staff to help them out.
Another example of people doing different tasks to achieve the same goal, would be a group of mechanics working together to restore a car. One person could be working the engine block, a second working on the suspension and breaks, while a third works on the chassis. If just one person is working alone, they don't have a penalty, they just take more time (more hits needed for the extended test). Even then I don't like the idea of this being team work, three people should get the job done three times faster, not a bit faster. In this scenario, I would probably just let all the mechanics roll, and total all the hits towards the extended action.
As for giving TM's a sly boost so they compare to deckers, I disagree, TM's need a rules rewrite so they don't need sly boost to be even.
Nartaki posting on the forums