You can generalize this to a "weakest link" issue. If you imagine splitting things into 100 expert teams instead of just 2, it becomes pretty clear that things

You can generalize this to a "weakest link" issue. If you imagine splitting things into 100 expert teams instead of just 2, it becomes pretty clear that things will move as fast as the slowest team (assuming a linear chain of dependencies). Unfortunately hit such situations quite a bit at my current workplace...