In reply to petestack:
Sorry Pete - wrote that on the basis of what I remembered from skimming through the posts yesterday; I think Gordon's suggestion is similar. Note to self: read the thread!
I think that where this sort of exercise has the potential to be useful, as opposed, perhaps, to "interesting, but largely academic" is in preparing people for what to expect when venturing abroad to trad areas where french grades are used; at least two of the Versante Sud guidebooks - Marmolada and Swiss Rock - use french grades (together with various additions - S/R1,2,3... protection grades, obligatory grades, alpine adjectival [TD,ED etc], and others), and while some of their content will fit the description "multipitch sport", a very significant amount won't. These are just two examples; the adoption of french grades seems to be spreading, and I suspect that there will be many more (although, were this not the case, one could have exactly the same discussion about what UIAA grade various routes would get - Right Wall somewhere between VII and VIII, presumably!).