Grouped as I inserted the word usually before grouped as either 3 2 or 2 3 although I m not sure that s what I meant either Many of the orchestral works listed at least have no indication in the notation that they are intended to be subdivided and I think we are talking about the natural human reaction to look for a subdivision in the rhythm So yes it s hard to listen to Mars without thinking of 3 2 although I believe there is a recording where the conductor is thinking 2 3 The Tchaikovsky could go either way or different ways in different measures But would we say 4 4 subdivided as 2 2 I didn t give the same attention to the other entries 7 8 et al although they probably need checking Thoughts