I agree. I couldn't find any statistics, but my impression is that in math, 4-5 years would be typical. At the school I went to, if you started without a Mast

I agree. I couldn't find any statistics, but my impression is that in math, 4-5 years would be typical. At the school I went to, if you started without a Master's degree, 8 years would be roughly (give or take a semester or 2) the maximum amount of time one could spend on a math PhD, so there's no way it can be close to the median time.