I've got them on Wednesday around 6PM. Listened 4-5 hours that night. Yesterday 4-5 more. Today so far 5 hours and 3-4 more to come.
So total 15 hours. Do you max out while burning in?
And as the tips go, I'll give it a try to light blue ones. When I first tried them (my first listening was on them), I didn't like them much but since I'm feeling sound has improved vastly, I'll give them another try after some burn in.
I max out on my cheapo mp3 player (which is quite loud, but not driver exploding loud) with drums n bass. Mochill (and vsonic) is absolutely right - you can't judge these things until you get close to 300 hours. So, you've got a lot more hours of burn in to go my friend!