Of course "rich do this, poor do that" arguments are by their nature simplified because we don't have the time, intelligence and typing ability to go through detailed breakdowns of statistical analysis of population data on a non-specialist forum. Well I don't :-)
Yes there is variability within each group and considerable overlap between the two populations, but I still believe that poorer people would on average spend more of their bonus than rich people, just because they would have more things they needed rather than just wanted.
Anyway, the main point of my argument that I put across poorly is that putting money into people's pockets would be a better way of stimulating the economy than putting the money onto bank's balance sheets through quantitative easing.