I know what you mean. We have a different idea in mind of just what we can do.
Most things we do take us longer than we anticipate, hence, we think we're slow.
Not so. Our minds are accelerated, have their own pace, our bodies work at a realistic pace. It's all in our minds.
Seriously.
It's one of the reasons why work and chores are so unpleasant. We think we can bang out our work in no time at all and are really bummed out that it takes us three times as long to do than we anticipate.
And I'm speaking purely from experience there.