Hi! I've got the German county variant here in Germany and I have the update since a few hours.
First of all. I am very disappointed that the update dropped Living images. You can see in the conversations post for yourselves that this is only for new 1520, 930 and 630. It worked very nice on previous Nokia Camera Beta versions, while it lasted
Finally I can connect my Treasure Tag due to BT LE 4.0 support, but oh wait... My battery of the TT died while waiting for the update. Now at least scanning the integrated NFC doesn't open the app in the store, and the app on the phone recognises it, but they don't really connect. Well, I buy a new battery tomorrow.
I am also very disappointed, that although this is named the official Windows Phone 8.1 release, Cortana still only works when region is set to USA. This was a dumb decision in the first place... I don't mind speaking with Cortana in English, or using the phone UI in English. In fact, I prefer it. But why on earth, the region setting must be to USA. I live in Germany!... I am actually from Bulgaria, and I am going to visit my home country for a few weeks. I'd like to switch my region to Bulgaria, but oh now it must keep it to USA - or no Cortana!... Genius. It almost keeps me from using their very private, very "limited" beta... /s
Project my screen didn't get the anticipated Wi-Fi support (some of us thought drivers would add this in Cyan, but no). I am sure that they can do it, but I guess those limitations make the new 930 and 630 look cooler...
Edit: Oh great! Now even the normal USB connection doesn't work for Project my screen! I used it before, I have the app on the PC, I am sure it worked fine. Oh gosh, I wanted to record some screencast videos...
Remember the hidden USB settings that Daniel sees on his 930? Well they're not unhidden in this update, at least for the L925... Not that they really do something.
I waited for this update with huge expectations, but overall, I don't see any change over WP 8.1 DP
And no, there is no tap to lock, this is b.s.
P.S. about the battery performance... to all of the readers... Please don't ask about this today! Probably all of us, with the updated Lumia 925's have our devices plugged in for the update, some have made a reset, or/and reinstall apps, then we'll be heavily testing the new update, for the next hours, today, and maybe the next day.... Let us test our phones at least a few more days, so we could properly asses battery performance with normal usage