Not exactly. More like a lack of detail because I didn't think nitpicking was going to happen. My main point, that you ignored, is that WotC over promise and under delivers. With the small crew they have, maybe they shouldn't talk about up coming stuff like PDFs, the OGL and conversion docs until those are a done deal. When a product is done and you know it is going to be released, giving a date isn't a bad thing. Like January the 20th he gave the dates for PotA. At that point the AP was going at the printers or the copies were in warehouses*. The PotA could still not be released, but then we are talking of force majeur. Mearls shouldn't be blamed for a fire in a warehouse.
Um... Well did he call firefighters or did he tweet that there was a fire?
*I assume, of course.