Recently picked up a new client, a great guy by the name of Jason Hubble. He runs a company that does lie detector tests.
As you can see, the option to cache ssl was unticked.
Notice the difference? You can see that the time to TTFB has shortened dramatically, as well as First Paint/DOM int becoming a quicker as well as the time between DOM int and DOM loaded and finally the Onload. Completing the Onload 1.2s quicker.
Services overview before:
Services Timings Before:
Service Overview After:
Service Timings After:
As you can see again, a massive speed difference for both the homepage and the services tab. So the moral of this story, make sure you check every option!