No, wait -- it's not credible. Despite the fact that @ceoSteveJobs is 100% fake, which a casual reading of the account timeline shows, Britain's Daily Mail newspaper still ran with a story yesterday that quoted the Twitter account as saying Apple might have to recall the iPhone 4. The story has been removed from the DM's website, but it's still posted on multiple syndication sites and scraper pages.
Meanwhile, MacRumors cites a newly received SteveMail that says "There is no reception issue. Stay tuned." This lends credence to the AppleInsider post that anticipates an iOS 4.01 release to correct the signal problems associated with the 'death grip.' Never a dull moment!
Thanks to everyone who sent this in.