Keep in mind that when you play Ladder 1v1 the displayed rating is the player's ladder rating, not global rating. There is a wide difference between these two figures for many players, who play a lot of team / regular games but few ladder matches.
For example, I played SirA (and won!!
![Very Happy :D](images/smilies/icon_e_biggrin.gif)
) in ladder yesterday. His rating in the Ladder was 940 (mine is ~900) but his global rating is ~1450 (mine is ~1250).
So don't be too worried if a Ladder rating 800 (or 600
![Shocked :shock:](images/smilies/icon_eek.gif)
) player beats you, their Global rating may be much higher.