I was inspired by you, and just went to the local bottle shop to see what they had. I picked up a bottle of the Deuchars IPA, a fullers ESB, and Kamkowe from Poland (it was in the $2 bargain bin, not bad for a 500ml bottle). The Deuchars was the only one out of your purchases that I hadn't tried before.
The Deuchars must have a bit of age to it, because the hops are very very mellow, not what I expected for an IPA. I cant find a use by date on the bottle to be able to tell. But saying that, its a brilliantly balanced beer, with some nice aroma hops and a good malty profile.
It's definitely on my list to try again, hopefully with a fresher bottle.