Ya the 1800 retort is inaccurate and has turned into a urban legend more than anything. I've never played a solo Shaman ever but I had a friend who was in my guild who lost their shaman on a 2345 team, they were rated 2300 or so. We went up against a 2350~ team and went 3-4. It wasn't terrible, it wasn't amazing but it was a mirror match and your expected to pull off a 50/50 rate at that caliber. I left the team that night to go play back with my 4 Shaman and a healer on my real team - I only joined to help them out until they got a Shaman from another server who transferred over.

From this one night episode everyone comes out of the woodwork with crazy comments