I'm torn about that.Being evasive about the specific sales numbers just continues to make Cook look weak and untrustworthy. Since he took office it's always been "we have great things we can't tell you about". He's yet to deliver a single positive surprise with the product line and increasingly it looks like pursuit of profit is at the expense of Apple reputation and future prosperity.
On one hand I also feel that he yet has to demonstrate the WOW'ing skills with surprising and really good products and that innovation and quality seem to increasingly lack in the recent years.
On the other hand Apple is more scrutinized than ever since they'd become the most valuable company (measured in stocks). A completely new product like the AW needs some time to grow and develop. Noone would expect a toddler to compete with Usain Bolt over 100m or cook a perfect meal already.
The first iPhone also was a bit meh in sales numbers. Only back then, expectations were a lot lower than they are today.
If nowadays Cook would reveal the numbers for the AW and they'd be lower than expected (which they would be for sure, because expectations are completely unrealistic), stock prices might fall and eventually someone might even think of sueing the company for causing falling stock prices.
Even if the revealed numbers would be pretty solid and expectable for such a new product - for any "normal" company, that is.