No one is discussing the specific case of Fairchild transistors, but logic-level transistors in general. So finding a web page mentioning these Fairchild transistors as being compatible with 1.8V logic levels can't be extrapolated into a proof applicable to all other logic-level transistors.

Look at this link instead, and tell me that "they do":
http://www.nxp.com/#/pip/pip=[pip=PH955L_2]|pp=[t=pip,i=PH955L_2]|

Edit: Here is an announcement for a "logic-level" device, where the "logic-level" part is that they have specified the on-resistance for a number of different logic levels, i.e. the transistor is not for a specific logic level.
http://www.electronicsweekly.com/products/...osfets.htm