No, it's not the same thing, but you could do something similar by taking a known voltage and building a series of dividers to check a range of voltages too. It was just a suggestion of one easy thing to check that might hint at how the meter is doing.
Me, I wouldn't worry about it. I'm with the camp that says as long as the meter provides repeatable/consistent results rather than pin-point accuracy it's doing what I need it to do.