First Byte Time Grade

Hello,

I don’t understand why the first byte time grade is A in the summary of this test :
http://www.webpagetest.org/result/110728_30_15JPZ/
And the grade is C in the other pages of the test results. For example :
http://www.webpagetest.org/result/110728_30_15JPZ/1/details/

Thanks for your support.

You can find the rules here:
http://www.webpagetest.org/forums/showthread.php?tid=870&pid=3864#pid3864

Your A test has a TTFB of 231ms, therefore it gets an A
Your C test has a TTFB of 465ms, therefore it gets a C

OK. I see:
The summary page gives the result of the run 4 which is the median run.
Other pages are based on the data of run 1 unless you select another run.

Maybe the run number could be added in the page you are looking at.
Presently, I can only guess this number by looking at the URL.

The summary page gives the result of the run 4 which is the median run. methoo.com