agree with you, except 2 things:
1. yes it changes from 6 to 10 but you need to remember that there are tons of instrumental tracks or very very unfinished demos (Sad, Stick And Move). instrumental demo is not always worth as demo with vocals.
2. you forget the biggest fail of linkin park history - lpu7. collection of live tracks that are already released on dsp's. nothing was special about it, it was against the LPU spirit.