i found they worked well. at one time, i was living out in etobicoke (mimico) and used to commute downtown on them in most weather conditions without any issues.

i did a quick check online, and they are apparently called "SPECIALIZED TURBO/S ATB". there is a little more info. here:
http://www.specialized.com/bc/SBCEqP...Ejt%3D19130645 (i could only find them on the US website)
http://www.bikepro.com/products/tire...bles_atb5.html
http://www.bikepro.com/products/tires/spec_narrow.html