Question about wpmudev and upfront performance

I am currently using another theme that seems to have a major delay in the first byte delivery of a webpage. Thinking of upfront as a replacement.
I am using wp 4.7.1, Php 7.1, FPM handler vis Nginx, Apache 2, Nginx proxy,

Testing the same tests on wpmudev.org
http://www.webpagetest.org/
Screen cap: http://ovo.li/2XVCr9

google
https://testmysite.thinkwithgoogle.com/
screen cap: http://ovo.li/yhNCZQ

The above tests show a slow first byte but not real bad. Given that all the other scores on webpagetest showed positive results I wonder how it is that the first byte is slow with CDN and all the rest ???

1. Is wpmudev using upfront ?
2. If it is using upfront how can the first byte be speeded up ?

Thank you