I do not want to engage in an argument or play with semantics. The voltage standard in the US is 120. What your meter reads at your house or what your devices say has nothing to do with the standard. Lower voltage at your household receptacle could be due to many factors such as length of wire going to your final test point. Below is a website showing World Standards for electricity. Seems Canada is also 120. Mexico on the other hand is 127. The word is "standard".
http://www.worldstandards.eu/electricity/plug-voltage-by-country/