all things are relative in comparison to where you are.
in america, my china bed is considered to be fairly firm but with a slight memory foam feel to it. in china, my bed is considered to be the softest bed my students have ever sat on!!! how do i know? because i had students and other teachers in the city sit on my bed to see what they think of it and they all sink in with awe and amazement! haha
here's a picture of all the layers it takes to get the "softness" complete: a hard chinese mattress, a foamy thing, a cushion thing, 2 sheets, and a comforter on top :)
wish i had a student dorm bed to compare it to, just use your imagination of a piece of wood with a thin hard mattress of 2 inches width... oh and a sheet :)
so so SO thankful for a "soft", comfortable, cozy (king size) bed to rest in :)