[notdonspaulding]

Leaving aside the apples/oranges comparison of the greater latitude given to the individual's rights in the US vs. the UK (2nd and 4th amendments in particular), I'd more or less agree with this criteria being a good way to distinguish the overall value of the two approaches to dealing with armed civilian confrontations.

That being said, if the numbers you're looking for exist in an unbiased, non-doctored study, I'd be surprised. If they did, and they supported the thesis, you'd see them quoted in every article advocating gun control.