Halsey and I were just having an argument about this on MSN. IMO they do, they are a professional unit that gives full effort to international cricket against competitive teams.
We also argued over whether Flintoff should be rested for ODI's, due to his back problems. Halsey mentioned resting him for the VB series late this year. To me this is utter rubbish. Flintoff, easily England's best ODI player, rested, AGAINST AUSTRALIA!!
England would be rolled over without much fuss.
It should be noted that it is almost universally agreed, that ODI's are not as important as tests and comparisons between the two are irrelevant.