And when horses did race much, much more often than they do now, say about 30 yrs ago when the bounce theory was conceived, the theory made a great deal more sense, although as far as I can tell until recently no one ever conducted any statistically valid research on the subject. IMHO, you can say the same thing about a no. of sheet & non-sheet handicapping theories, in that they were either never tested in the 1st place or have not been reconsidered as dramatic changes have taken place in racing. In many cases their "validty" rests on the proposition that they have been repeated over & over again. Unless you plan on doing the statistical work yourself PP, or are lucky enough to have the right connections, I wouldn't expect much in the way of change over the next 10 yrs or so.