Yes, they're still sending out upgrade letters. I just got mine today.
I received the "big" increase when my statement cut on June 29th - from $500 to $2,500.
I wasn't expecting an upgrade because I wasn't in the first wave of letters.
Congrats to all who are being upgraded. Hold tight to those who haven't yet received a letter - it may be on the way soon.
Aside from being able to use the card anywhere, is there any benefit to this upgrade?