Used a US VPN to see whats the latest version and its 2.11.491, which is the same as installed version on mine (India). However, I still don't see the option to scan QR code.

I'm on WP8 which I imagine you probably aren't, so this may not be useful to you, but in case it's relevant across platforms, or in case there are any WP8 readers:

a.) I updated when I saw this HN submission, a 17mb update, to version 2.11.634 (it didn't updated automatically, but was available when I checked my app store)

b.) Opening whatsapp after the update showed it had updated (I could see some other features that had changed), but I couldn't find the web option. After killing whatsapp and restarting it, it then appeared on a menu where it hadn't been before

It's finally working for me, so i guess it will be available worldwide :D