i've seen a couple recipes recently that do not have an early bittering hop addition at 60 or 45 minutes. one as a porter that had an ounce of bravo at 15 minutes and another was a mexican lager with 1.5 oz amarillo at 10 minutes. two very different styles. i hadn't seen this before and was wondering if anyone else and tried this technique. would the beer have any bitterness or would the hops only contribute flavor? any issues with long term stability for beers without bittering hops?