Home-brewing is bigger than ever, according to a Wall Street Journal article (we’ll see if that changes after a biology professor recently told NPR that there are remnants of ground cockroaches in your cuppa), but McDonald’s is still hoping its new line of $2.29 to $3.29 espresso drinks will add $1 billion in revenue. Yesterday Mickey D’s aptly named publicist, Zoe Hamburger, sent us word that McCafé had launched in stores, and pointed out that it had beat Starbucks in a taste test. Today, Nation’s Restaurant News reports that Starbucks has responded by rolling out its Iced Brewed Coffee, and Dunkin’ Donuts is slashing its coffee prices by 15 percent. Starbucks says it, too, will drop some prices (for instance, on iced coffee), but will raise others, and has launched an advertising campaign: “Beware of a cheaper cup of coffee. It comes with a price.” Okay, fine, but the McCafé mocha comes with a shit-ton of whipped cream.