Yea, it's why I hate express. Those who stay at the resorts (or bought the tickets) don't want to risk waiting, so they'll take the Express Line, even if it's posted a 5 minute wait. There's a lot of detail in the queue. Let's see what attractions have what...
USF - (what you miss with Express)
Nuetron - no difference
Shrek - no difference
Twister - no difference
Mummy - not a whole lot. still get the eerie environment
Jaws - no difference
MIB - miss the preshow (cmon express users, just do it once), miss the room with the aliens pushing all the buttons, and the hallway with the doors you can pull on
ET - now the line goes through the forest scene a bit before splitting into express.
IOA
Hulk - miss the laboratory part. and the ability to wait for the front heh
Doom - miss EVERYTHING... doom's express line is the worst, I hate it. how many express holders see the actual line here? it's a really good queue, one of the best at IOA
Spiderman - express line is a little better then the regular line, but you miss the story video
Ripsaw - miss everything
Popeye - miss everything
River Adventure - no difference
Flying Unicorn - no difference
Dragons - a LOT you miss. You mess the best queue line in the world
poseidon - no difference
trolley - no difference
caro - no difference
one fish - no difference
cat in the hat - just look through the "hedges" you basically can see the whole line