Absolutely, Lin Dan is simply The Greatest !
Do you all remember last year at the Thomas Cup 2010, the match between Lin Dan and Lee Chong Wei in the CHN-MAS Semi-Final? Lin Dan was awesome, total domination,master class,just like his Beijing Olympic victory over Lee CW, winning in style with a score of 21-17 and 21-8 ! Imagine 21-8 in the 2nd game, who can do that to Lee CW?
And he proved it again this year (thoiugh the score was much closer,but that's not the point) by winning the World Championship for the 4th time, against none other than Lee CW. One more time, look how he tamed Sho Sasaki in the just-concluded Li Ning China Masters, a not-easy-to-beat world ranked number 9 player, by a score line of 21-15,21-6!
Anyway,in my humble opinion,the best testimonial or confirmation is from other great badminton players, whether his peers or past masters, and you have two of them saying so: Peter Gade and Morten Frost.
Well,somebody might think of a way to poll all the top 50 players in this generation and as many of the past renowned players as possible, including coaches, to see who they regard as "The Greatest of All Time". I am sure their views count more than ordinary amateurs or nobodies like me.