I've only had one stick from each box so far, but I am very pleased to report that the BHK52 I smoked this weekend from MES ABR 11 was actually better than the stick I had several months ago from LBT MAR 10.
The opening (of the 2011 stick) didn't have as much hay as the '10, but was a little bit sweeter. But it was the middle of the cigar where the '11 really shined - so floral, so perfumey, just utterly beguiling. 'Still had lots of background nuances of tobacco and leather, but the sweet/spicy floral character was to die for! The end became earthier, with noticeable mushroom character and more leather - still hints of the floral character, but much more subdued than the middle third. I didn't get nearly that degree of complexity from the '10, fwiw.
So is it the wrapper? Is it a new batch of tobacco altogether? Is it chance chance variation? With such a small sample, it's impossible to say. I think it's likely that the '10s are probably better in general than the one I had (which was still outstanding, to be sure), but from this introduction I'm willing to bet that the '11s are likely to be just as good, or perhaps even better (i.e., more to my personal taste).
In a larger context, I'm willing to say that this '11 BHK52 was one of the best, most alluring, most complex cigars I've ever smoked. 'Not bad for such a youngster. If these improve significantly with age, I will be beside myself with joy!