Sir Howard Stringer, CEO of Sony, sounded less apologetic and more prickly when asked today about the PlayStation maker's slowness in informing PlayStation Network and Qriocity subscribers of an attack on the company's network.

Reuters reports that Stringer fired back at critics who questioned Sony's promptness after the April attack on the company's PlayStation Network. His testy response is in contrast to the humble apologies issued by Japanese executives at the beginning of May.

Stringer also endorsed PlayStation boss Kaz Hirai's efforts during the breach and subsequent downtime for PlayStation owners.

As for the financial impact on Sony? "The charges mount up, but they don't add up to a number we can quantify just yet," Stringer said.

Sony defends response time to hacker breach [Reuters]