I bought a bottle of batch #27 on Christmas Eve and also noticed a rubber/sulphury taste. A bit like burned rubber tires. This was my first ever bottle of a'bunadh and yeah, I guess I am a little disappointed in it
Prior to that I bought a bottle of Aberlour 16/yo and have almost finished that one, the difference is like daylight and dark, the 16/yo was truly wonderful and one of my favorites so far.
Even adding a fair bit of water and an ice cube isn't really fixing the #27's rubbery bitterness for my tastes, so (horror of horrors!) I'm putting a splash of Laphroig 10/yo into each dram of #27 along with a little water. I figure if I'm gonna drink a burning tire, I want some smoke to go with it