Lumia 520 update status

So I thought unlocked phones are supposed to be getting updates sooner than carrier locked ones?

I bought my cheapo Lumia 520 from mobicity ( http://www.mobicity.com/nokia-lumia-520.html# ), unlocked, yet now I see some carrier locked 520s getting the Black update, even here in Croatia, and nothing on my phone.

What's up with that? Is that normal or is there something wrong with the phone I bought?