[dave]

I'm not about to put a percentage on it, but, to me, it has a huge impact. There used to be a couple/few lines that had identical filler/binder, but were offered in different wrappers. (La Auroroa, maybe?) Was a good way to gauge the impact for yourself.
So many 'recipes' are protected nowadays that its difficult to make a good assessment of what's in a cigar, much less what's impacting your impression at any one point. I do know, however, that there are certain wrappers that I do not enjoy, no matter what cigar is blended within. I do believe that smaller RG's are impacted more by the wrapper, but if you hand me an unbanded 60RG cigar with an SA wrapper, I'll know it immediately.