With all the problems I have heard about I am surprised it took so long.
I personally have not had a problem with the Dunlops on my 09 FLHTCU Got good milage with them Replaced them in Nov 2010 with 20,000. miles on them and they had 3/32 tread left could have gone more but the rainy season was starting so new tires went on. I replaced them with a new set of Dunlops and I hope to get same trouble free miles out of them.