Visited my local craft brewery last week and was chatting to the head brewer about hops in general... to cut to the chase I was a bit surprised when he told me that to bitter a beer with anything other that the lowest cost AA% by weight hop was a waste because at 60+ mins boiling everything aroma and flavour wise just evaporates away.... which meant he used Hercules for bittering at around 17% AA for every beer he produced but only the lower AA hop varieties for aroma and flavour later in the boil.
Now I question whether bitterness is just bitterness.... is there a different kind of bitterness associated with different hops. If you ask me I reckon there is a difference. His Pils had a kind of harsh bitterness to me... not soft. So my limited abilities confine my description to hard and soft...bitterness.
So, is it a waste to use hops for bittering if they aint mega AA% ? Interested in your views...