>>How much do want to bet that the Germans knew about it anyway, even the day after it happened? The media had the talent for getting the word out really damn fast, and usually embellished.<< [edited to use the proper quote]
They may have. I doubt that any German agents were privvy to any private discussions held over cigars and brandy, but they did read the newspapers, and the had plenty of smart naval architects who could crunch the numbers with the best of them. I doubt they were fooled, but it was probably convenient to pretend that they were. They were operating liners too, and the new ones were larger then the Olympic so if you cast doubt on the safety of large vessels, you cast doubt on the safety of your own.
At least that's the perception with Joe Sixpack on the streets, and in business, perceptions count a for a lot more then reality.
In any event, David makes a helluva good point about the spinmeistering. Sometimes, the idea isn't to pull the wool over the eyes of a nominal enemy, but in snookering your own citizens. This quaint and time honoured exercise is known as "Restoring Confidence." in whatever it's expediant to restore confidence in.