Yeah, totally depends on the brewery. I have sent requests and recieved nothing in return. It also sometimes depends on the beer. For instance, Unita did two Can You Brew It shows and gave out recipes, but I have been unable to get them to divulge any info regarding Hopnotch. Other breweries will help homebrew shops create clones of their beer (see Northern Brewer with Surly, Lakefront, etc.).
Some breweries will offer up their recipes to homebrewers. I emailed Jamil requesting a Heretic recipe and he responded within a few days. I think he is correct when he says that it doesn't matter if a brewery gives out recipes because there is far more to brewing than a recipe.
That being said, if a brewery does not want to give out information, it is their right to do so. Ask politely and see if they respond.