So I was upgraded on my return leg today for PHX-SEA and when I logged on to make sure my flight wasn't delayed and to see if I had a seatmate on the way down tonight. My return flight had already put me in 2D before I had got the upgrade confirmed email. This was about 10am then at 4pm today I just got the email. Interesting how it took 6+ hours to notify me. No complaining or anything in this post just curious if this normally happens to others?