but to the average person who doesn't have kids, they don't care about months
i think 27 months is a little much
I guess one point is, if you hate when people use months but you know most mothers will give the age in months, stop asking the age of the baby. If you don't really care about how old they really are, don't ask. Problem solved, you won't ever have to hear how many months someone is.
Even before I had kids I would have expected to hear the age in months before a certain age. I generally stopped at 2 but it doesn't bug me past that age.
EDIT I guess I just prefer it in months. :)
But seriously, if it bugged me I just wouldn't ask anymore. I find it annoying when other mothers would ask my child's weight or what he can or can't do yet. I hated people always trying to compare. I just stopped giving specific answers and avoiding the questions to cut down the annoyance.