For me, this is a tough one. It's hard to see how one can get an objective view on this. I see myself having large gaps appear in my memory and it appears it's accelerating. External observers don't see enough to know about the rate of decline. And I don't know enough about overall rates in the general population.
And when my friends and family reassure me it's not as bad as I think, I accuse them of being nice with me.