One of several reasons I choose UA Int'l is when returning from places like SIN, as soon as i step on the aircraft, I feel like i'm back in the USA. ^
Now this however is taking that sense of "feeling" a bit too far!
My guess for the reason for the TED poster in the SIN CTO: I'd imagine most of those flying UA out of SIN are headed to the US...and if they land in LAX there's a decent chance they'll be connecting to TED.