Yes, it is. For the field as a whole? Yes, it absolutely is. For specific segments of it? No. Some of those are higher. And others are lower.
> 20 years of savings at 30% of income will get you $2M. Which is not a fat retirement, but still doable.
Healthcare complicates early retirement badly in the US. Retire at (say) 45 with only $2m in the bank and you are... gambling. To put it mildly. Even if you live reasonably frugally.