Speaking as someone who used to work at Motorola, and still knows many people there,..that's a crock and a pretty obvious one. All of the Motorola management, down to a pretty low level, has been replaced by Googlers. This is a fiction Google maintains so the other Android manufactures don't revolt. Of course they know its a fiction too but play along.
Not a bad thing since I left Motorola because I thought the management was terrible.
The good news is that its really only the carriers in the way of updates so I think you will see them fairly quickly.
Also I think it's pretty safe to throw out any assumptions based on the old Motorola. Thousands of people from the old Motorola are gone and whole divisions have been axed. It's a Google run show now not that they always are the best at consumer hardware.
Also the person who is asking for tap to focus on the X must not realize that this is an option in the menu.
1) Because Google has made is clear that Motorola is still it's own division and has distanced itself from giving exclusivity to Motorola. So just because Motorola is owned by Google does not necessarily mean updates will happen more quickly than any other OEM. It's not a Nexus!
So yeah, we can hope that some minor updates will come quickly, but I'm not holding my breath. And you can expect a major release like 4.3 or 4.4 to come significantly later on the Moto X than they will on the Nexus or GPE devices.
For normal Google services yes, for camera, which is hardware, I'm not sure how they would do that. Google's efforts in this area revolve around fragmentation of Google services on different versions of Android not really anything else.
I'm not exactly sure how this will work. Given how Google has been modifying Android to be more modular, perhaps these improvements will be delivered via the Play Store bypassing any carrier intervention.