I wouldn't go so far to say it is meaningless. It is just as important as the withdraw percentage. Those two numbers give you your income amount.
If your roll-up was 5% and your payout was 5% say at age 60 on one product and on another the roll-up was 8% and your payout was 5% at age 60, which one has the higher payout?
Both numbers must be taken into consideration when looking at the highest payout. Both have meaning.
That's what I was getting at. The number is meaningless without the other piece of the puzzle.