Crab, I don’t think Sam Adams is any longer considered a micro brewery, along with others, such as SweetWater(been a Brit never understood their 420 brew!), that started as micro brewery and now are available outside of the USA.
Lonewolf, my wife is American and enjoys the occasional Guinness, but says it doesn’t compare to the Guinness that she had the first time I took her to Dublin, that said it was St Patrick’s Day so things might have got a little blurred!