Nah, we said ninety-nine, which is the equivalent of saying ten. The equivalent of twenty-ten is saying nineteen-ninety-nine. Oh-ten is shorter than twenty-ten, so it makes more sense to make it as the abbreviation.
That's what we called last decade; Oh-Seven, Oh-Eight, Oh-Boring.
Have fun living in the past, Gramps, I'll be on my space cruiser in Twenty-Ten, call me on your telegraph sometime.