It's only laughable if you make an assumption as to what he was referring to. Why would you assume "secrecy" was about parts leaks.
What was the most publicized secrecy issues Apple had the last couple of years? Not parts leaks, the average consumer is clueless to these. The biggest stories were prototypes left in bars. Seen any of those lately? Didn't think so.
In my book, seems like Cook has addressing the biggest issue Apple had the past couple of years.
The only thing he specifically did mention re: secrecy was deals to purchase companies. That's been a bit more hush hush as well.
The fact is that there are way more leaks now than ever before in Apple's history. Yes, it's due primarily to their popularity. Controlling leaks, including parts, has always been a part of the company's secrecy M.O.
Just because these parts aren't showing up in a bar doesn't mean Apple is happy with them. I also think more of the general public knows about these than you give them credit. The news of leaks isn't just appearing on Macrumors. They're also popping up in mainstream news outlets like ABC:
http://abcnews.go.com/m/blogEntry?id=16888477
Even my decidedly non-techie in-laws know that the next iPhone is supposed to have a 4" screen.