Rahmstorf: Is it OK to call him an “alarmist” now?

http://climatesanity.wordpress.com/2012/05/09/rahmstorf-is-it-ok-to-call-him-an-alarmist-now
So, Rahmstorf is worried about a "complete meltdown of the Greenland ice sheet" which would lead to 7 meters (7000 mm) of sea level rise, but the data shows "sea level rise associated with Greenland glacier dynamics remains well below the low-end scenario (9.3 cm by 2100)" (93 mm by 2100). Does being off by a factor of 75 (7000/93) qualify as "alarmist?"