Maybe it's me but their test seems to hate sites hosted in europe. (Strato, Germany)

First I tested my site's landing page:

43/100 - ok, no SSL, so HTTP2 and 367ms TTFB - I also apparently committed the capital sin of including a 160kb CSS file (foundation) without stripping it. Serves those 5 visitors per month well! Comparison: 66(mobile)/77(desktop) of 100 from Google PageSpeed Insights (with more useful hints what to fix) and 75/100 from tools.pingdom.com (224kb incl JS and CSS is apparently still too big and missing caching/Vary header).

But now my gripe:

Same host, https, an empty page with 0b - only gets 72/100 because of missing HTTP2 and slow TTFB of 185ms.

Insights doesn't even render this page and it gets 83/100 from Pingdom. Faster than 99% of sites, 0B and still only 83/100. I think most of these metrics are a bit off...

Edit: just amended my empty test page to be exactly 200 bytes and be real html. Insights: 100/100, Pingdom: 100/100, Netlify: 0/100 because 1067ms TTFB