Originally Posted by vincom
As a Platinum you should be fine, I did this route as a MR last year when the fares were real low as a SILVER and I was EUAed EWR-IAH-ANC-SEA but not SEA-EWR (as expected).
Last year I got 85% upgrades as Plat, this year I'm at 62%. Several years before I got > 70% as SILVER.
Many flights can be nailbiters these days. I would say any anecdotal data older than say 6 months is probably not relevant.