Is a little jitter normal for avchd

Here is my system:

 

asus p6x58d-e
windows 7 64bit
12 gig ram
i7 950
GTX-470 latest drivers
antec 1000 watt power supply

5 1t Western Digital Black Caviar Drives

 

Scratch Disks:

Video: Drive G – RAID 0 2 disks

Captured Audio: Drive D

Video Previews: Drive G – RAID 0

Audio Previews: Drive D

System C

 

I am shooting avchd 720p60

 

My question is: is it normal to have a little jitter during playback on the timeline with a single clip with no effects.

via Adobe Community : Popular Discussions – Adobe Premiere Forums http://forums.adobe.com/thread/823847