Why are we even surprised? Bangle was design director at BMW since '92. All models designed after that period, technically, are Bangle's responsibilities, and that includes all the wildly popular models such as the E36/7, E39, E46, X5, and Z8.
The main difference is that Wolfgang Reitzle used to be the head of BMW and he had a better "reign" on Bangle. However, from what I understand, all the new models appearing now (1, 5, 6, 7, Z4) all bore out of a huge design brainstorm in '96, when Reitzle was still head of BMW.