Wow math isn't your strongest point.
You're saying the K5 slows down after 1 second because the buffer is full... so that means it is taken 23 frames per second!!!
Okay just for you the K5 shoot 6,5 fps and the buffer holds 23 photos so that is 3,5 seconds, quite a bit more then your 1 second...
With 3 FPS it takes 8 seconds to fill it.
Now for the 5D mark II
The buffer holds 11 photos so that is filled in less then 3 seconds, shorter then the K5 and then according to reports it slows down to 1,7 to 0.6 fps.
Canon EOS 5D Mark II Camera Performance - Full Review
You're barking at the wrong tree it seems... in almost anyway the K5 seems better then the 5D mkII when it comes to this.
now... i'm still waiting for you to say which camera has a larger buffer.