via www.nytimes.com/

Such attention is becoming increasingly common as interactive technologies enable consumers to rapidly convey opinions to marketers.

“You used to wait to go to the water cooler or a cocktail party to talk over something,” said Richard Laermer, chief executive at RLM Public Relations in New York.

“Now, every minute is a cocktail party,” he added. “You write an e-mail and in an hour, you’ve got a fan base agreeing with you.”

That ability to share brickbats or bouquets with other consumers is important because it facilitates the formation of ad hoc groups, more likely to be listened to than individuals.

“There will always be people complaining, and always be people complaining about the complainers,” said Peter Shankman, a public relations executive who specializes in social media. “But this makes it easier to put us together.”

The phenomenon was on display last week when users of Facebook complained about changes to the Web site’s terms of service using methods that included, yes, groups on facebook.com. Facebook yielded to the protests and reverted to its original contract with users.

And in November, many consumers who used Twitter to criticize an ad for Motrin pain reliever received responses within 48 hours from the brand’s maker, a unit of Johnson & Johnson, which apologized for the ad and told them it had been withdrawn.

“Twitter is the ultimate focus group,” Mr. Shankman said. “I can post something and in a minute get feedback from 700 people around the world, giving me their real opinions.”

Twitter is the ultimate focus group