[GPS_Standard] 1pps acurracy on SiRF Star III?

[saper]

Hello,
I am thinking about building GPS disciplined frequency normal.
I prefer using a small GPS module like AarLogic GPS 3M
http://www.roundsolutions.com/shop/products/en/Modules-and-accessories/GPS-Module/AarLogic-GPS-3M-Surface-mount-GPS-module-with-SiRF.html
Unfortunately, most of these modules is used SiRF III chipset and this 
have 1pps marked as non for timing aplication.
Someone you did not measure 1PPS accuracy of SiRF II?

Thanks you