Maybe bitter is not the right description. It definitely tastes "weird", at least to me. IIRC this is the source of my rationale http://www.trappistwestmalle.be/en/page/bewaartips.aspx Also from John Palmers book: http://www.howtobrew.com/section1/chapter11-9.html Of course I read all this before trying the beers. I may have been brainwashed into thinking the least layer was bitter lol. ahh the power of suggestion.