FordParts.com does not specify a date either for the TPMS sensor switchover. But the frequencies the sensors use are different. Maybe a local Ford dealer or tire center could help you out?
Tire-wise, the Alpine and Blizzak are also very highly rated at Tirerack.com. Were you considering the Hakkapeliitta?
To quote Blaine109 on the "other forum":
"There are 2 possibilities for your sensor. If you have a 2010 up to May 2010 then you have the band type sensor (Dill part# 1048). If you have a post April 2010 or a 2011+ Taurus then you have the newer snap-in type sensor (Schrader part# 20315). You can probably expect to pay $65-$95 for either sensor plus tax. You can find cheaper alternative sensors (such as an Oro-Tek OSC-0315 or their universal sensor the OTI-001 for the 2011+ Taurus) for a few bucks cheaper ($50-$75), although they have metal valve stems vs. rubber ones so they will not match your other ones on the car. Then you will have to have a tire shop dismount your tire, install the sensor, remount and balance the tire and then do the relearn procedure, roughly $30-$50 in shop labor."
and Ecobrick Bob:
"I ended up getting my TPMS from TireRack, as the tires and wheels were coming mounted. The savings difference would have been wiped out by the re-mount and Road Force Balance. I researched things pretty thoroughly. There are 2-3 different sensor models that are used by Ford, in the stock setup. The Ford bands cannot be re-used as they have a permanent clip that holds bands on, and gets destroyed when you take sensors off. Aftermarket bands are basically a big S.S. "hose" clamp that is adjustable and can be re-used. So... if you want the cheapest way out, you can just by the bands. Another option to make absolutely sure of the correct model TPMS, would be to pull one wheel and take off tire to check. Another option would be to check with TASCA Parts (Ford dealer who sells discount parts) or your local dealer to find part # and get a price comparison, before searching EBAY."
"In 2010, I talked with a Schrader Valve rep via e-mail about switching over to their 315 mhs stem TPMS, that was going into the 2011. He told me that the system works the same and with the same Ford TPMS controller. However, Ford has changed the TPMS message accepted to the opposite of the Siemens band TPMS sensors (+1 or -1) so you can't use the latter with the former controller settings. He said it was possible for Ford to change that coding, but that to his knowledge, Ford Dealers couldn't. Perhaps they can now... I would talk to the Selling Dealer and find out if they somehow were able to do this."
Look up the "Anyone dealt with the TPMS?" thread over there.
