Over the last few months, the trend I see is that import labels come off with little to no trouble and the domestics are a real PIA. In general, the imports accept the cap I get from my LHBS. The exceptions so far are Dos Equis and Bitburger.
So far, the following labels come off very easily with a short oxyclean soak and take the caps I get at my LHBS (Homebrew USA, Virginia Beach, VA):
- Warsteiner
- Paulaner
- Aventinus
- Sam Smith's
- Kona Brewing *
- Grolsch
- Moylan's
* a little troublesome, but worth the effort.
The following, while taking the standard cap, are a real PIA to de-label:
- Brooklyn Brewery
- Saranac
- Magic Hat
Hope the data is useful. Suppose I'll update this as I learn more. For everyone who has contributed to this thread, thank you.
