The distant past indeed would have helped the AL East.
Going back 17 seasons to include the 2007 Red Sox, the tally would be AL East 6, AL Central 4 and AL West 7.
Going back 12 seasons the tally would be AL East 3, AL Central 4 and AL West 5.
At six years the tally is AL East 2 and AL West 4 (with sign-stealing clouds looming over two franchises).