Hello again.
@Lester Chan Your plugins are awesome.

I have been using pingdom for a while. It is great to pinpoint issues that are intermittent. The only problem I have found is that pingdom have issues with the response timing due to some of their networks. On average, we get a ping of 250, but we have seen this spike at 13000ms! When cross referenced with our server log, the server was much more responsive than that and was actively working with around 75% of resources available.

We also use cloudflare, but that too has caused some issues, with one site getting over 180'000 errors per day according to google webmaster. These errors are not logged on our server and cloudflare are taking a while to address the issue.

While pingdom is probably the best, it is naturally not precise. Surely there must be a better server side method to do this.

At the moment I have a test running that I am very excited about. I am blocking users who hide adverts from one of our free websites. I have been unable to find results of this nature from any tests by anyone else. On average, you have 8.25% of firefox users with Adblock plus, but we are targeting all blocking software. After the first day, we can see that the users blocking adverts are around 20%. Of those, around 20% of them seem to be disabling the software when asked.
We offer a plan for $1 per month where no adverts will be seen if the user does not want to see any adverts.
I hope to publish a full report on this as soon as we have completed the first week and have crunched all the numbers. Please let me know if you would like to run some tests on the numbers we produce.