CDN Decreasing Time to First Byte (CDN)

I posted this in Off Topic because it's not necessarily about Centminmod.

My question is how you reduce the time to first byte. I'm currently testing out three different CDNs (Rackspace, Cloudfront, and KeyCDN). The website is 100% static and only contains one HTML file and one CSS file so it's all on the CDN. All three fail webpagetest.org with a First Byte Time between 0.928s and 1.172s.

What I still don't understand is how I can get a lower time to first byte on the same website hosted on a VPS without a CDN. Keep in mind that my server is in the southern US and I'm testing in Europe/South America/Australia. Two static files on a CDN can't outperform a VPS thousands of miles away?

I'm not discrediting Centminmod because the optimization is awesome, I just don't understand...there's latency/distance involved with a single server which should be minimal with nearby CDN POPs!?

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Even initial render time is mostly slower.
Data captured from: WebPagetest - Website Performance and Optimization Test

CDN comparison Buenos Aires, Argentina:
☒ Rackspace: +287ms (32% increase)
☒ KeyCDN: +587ms (65% increase)
☑ Cloudfront: -119ms (13% decrease)
☑ Cloudflare: -522ms (58% decrease)

CDN comparison Australia:
☒ Rackspace: +499ms (57% increase)
☒ KeyCDN: +986ms (112% increase)
☑ Cloudfront: -201ms (23% decrease)
☑ Cloudflare: -500ms (57% decrease)

CDN comparison Singapore:
☒ Rackspace: +800ms (74% increase)
☒ KeyCDN: +592ms (55% increase)
☒ Cloudfront: +100ms (9% increase)
☑ Cloudflare: -307ms (28% decrease)

CDN comparison Frankfurt, Germany:
☒ Rackspace: +796ms (117% increase)
☑ KeyCDN: -101ms (15% decrease)
☒ Cloudfront: +95ms (14% increase)
☑ Cloudflare: -302ms (44% decrease)

Doesn't seem like enough data, but from these four tests Cloudfront looks to be just slightly better in terms of initial render time. Maybe I should just stick with Cloudfront and forget about benchmarking every little thing. Seems like Amazon has a good them going for them with Cloudfront + Route 53 (which I have yet to try out).

Edit: Cloudflare might be a better option

 

Just added Cloudflare stats
Maybe Cloudflare is the way to go!

 

I still don't know how they offer all this for free compared to the other CDNs
I know some specific features might be missing, but still...

 

I wish they had account wide plans. I own about 15 domains I would like to have on Cloudflare but I can't see paying for each of them individually.