The main difference that I have observed is that at the beginning (and I have been reading it from the beginning), it seemed to me that there were about equal numbers of business travelers and leisure travelers on this board. Now, it appears that the vast majority of the posters, especially the American members, are predominantly leisure travelers.

These groups have different areas on which they focus and are looking for different things out of FF programs, but interesting and insightful posts are not exclusive to either group. And altho it may seem that redundant and just plain unnecessary posts largely come from the leisure group, that is only because that group is so much larger now. I don't think that either has per capita any monopoly on that sort of stuff.