I also know for a fact that brewers all over the country regularly borrow raw ingredients off each other, seek advice on things that have gone wrong or just ring each other up for a natter about their next beer; I could go on but it would seem pointless in a way because I'm pretty sure it will fall on deaf doggy ears.I will leave the debate to her comment thread (where James and other brewing luminaries duke it out), but there's some context here that's very important: the US and Britain have very different markets. They are structurally very different--British breweries can own pubs, for example--but also different in terms of development. In Britain's ale market you have new craft breweries competing against venerable brewing institutions. American craft brewing is brand new by comparison with only a couple older, regional breweries in the mix.
What I will say is this though: this is utter, utter rubbish and I would implore you not to listen to it.
The UK brewing industry is not only booming and forward-thinking, it is also fabulously friendly and I feel, quite strongly, that BrewDog owes the industry as a whole a bloody enormous apology.*
But the biggest difference is growth: the American market has been growing in double digits for years now. To fail, a brewery has to make unwise business decisions or produce terrible beer. In an expanding market, competition means fighting for those new drinkers, not protecting your core line. Britain's market is stable and the ale segment is even growing a bit, but at nothing like the rate it is here. Over the past generation, there has been huge churn in British brewing, and it was quite possible to steward your company wisely, make good beer, and fail. In that environment, you're fighting not to see how fast you can grow, but to see if you can survive.
Sometimes we forget these are businesses. They aren't community organizations. If American breweries are open and friendly, it's because their livelihoods aren't jeopardized. If British breweries are more wary, it's because the market is tighter and they feel the sense of competition far more keenly. It's not one big happy family, it's a market. Collaborations are not only fun, they're profitable. At a certain point, America will find equilibrium in its ale segment, and then things will change. There's nothing innately open about US craft breweries; it's the market that's open. Wide open.
*Melissa muddies the water when she brings "friendly" into it. James never said anything about friendly, he said "open." It's not a small difference.