Correct the explanation of load time percentiles

[iheggo]

The example of illustrating the idea of percentiles is incorrect, some numbers are wrong and the clarification is unclear. Though, I adjusted it slightly to make it better and easy to understand

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[mayya-sharipova]

Thank you for your contribution!
You very well noticed 10-723ms and 941-980ms numbers.
But I don't think this sentence is right: "with majority of a load time between 168ms to 723ms". These numbers denote 25% and 75% percentiles, so only half of loads fall into this range. I think your previous sentence normally loads in 10-723ms should be enough.

[iheggo]

You are welcome!
Yes, you are right. Actually I meant to say an average or moderate rate.
However, I've considered your suggestion. I've removed this confusing sentence.

[mayya-sharipova]

@iheggo Thanks, later today I will merge your changes to other branches as well.