Right, I meant they're unusual for Big Fruit. And also, the period between this reveal and release this summer is equally unusual...
I'd say that the lag between announce & release is a little more worrisome and something that I wouldn't want to see become a trend at Apple. I've always felt that a big part of their press was their general tendency to release right at announcement of a product or soon thereafter. Though, now that I think about it, I guess their OS releases have, by necessity, had to have some lead time associated with them.
The lag time surprised me, too, but if you're going to tell your app developers they can no longer sell directly to their customers without jumping through a few hoops, you definitely at least want to give them a long head's up. I'd bet the trend of early preview windows correlates very strongly with how much it impacts developing on OS X.
I'd say that the lag between announce & release is a little more worrisome and something that I wouldn't want to see become a trend at Apple. I've always felt that a big part of their press was their general tendency to release right at announcement of a product or soon thereafter. Though, now that I think about it, I guess their OS releases have, by necessity, had to have some lead time associated with them.