Turnigy nano-tech batteries

I tired the Nano 6000mAh 25C packs and they gave me no performance difference when compared to my Turnigy 5800mAh 25C packs. Absolutely no difference at all. I have sold the truck with the batts so I couldn't really speak about their long term performance but it seems to be a common theme about them that most users don't get much use out of them. For me the normal Turnigy 5K 40C packs have been excellent and see no reason for changing to anything else. They still destroy my diffs, twist my dog bones/CVD's, break the drive cups.............