The other interesting fact is they reduced the ampacity for #14 wire from 20 amps to 15. Reasoning according to the ROP report for the 2011 NEC is to put it inline with the CEC. Not for safety, not for electrical issues. So much for the NEC is being about safety...
Now that is irony. The Canadian Electrical Code recently increased the values for #14 to 20A subject to overcurrent not set more then 15A. Basically that translates to #14 to have a better current carrying capacity when it comes to de-rating for things like temperature or when there are more then three current carrying conductors in contact.
