Most tech sites skip an important bit of info in this report, the 625 and 521 are expanding fast. Not while ago, the 920 and 620 were the 2nd and 3rd and sometimes they were swapping places,while the 720 was fourth. Now, the 625 has propelled to be 2nd the 521 (one variant for one carrier in one country !!!) out of no where has become the 4th.
I still use WP8 on my Lumia 1320 and I am happy but it will be even more exciting with new update! Love WP8 smoothness