Speed improvement vs Pi-hole

Hi !

( Tried posting on your website news item from Dec'18 but Disqus is jammed.
Don't know how to post a comment on the hackernews thread-no button !)

Just read the informative hackernews thread:

https://news.ycombinator.com/item?id=18788410

1. Per Troy Hunt article, how much speed/throughout improvement can we expect from Adguard DNS compared with Pi-hole?

2. Is it true that Youtube/ Netflix/other websites could slow down with Adguard DNS compared with Pi-hole? What is the comparison?

3. CloudFlare states that Adguard uses it as CDN for 4x speed improvement, with a quote from Adguard founder:

https://www.cloudflare.com/case-studies/adguard/

So this all confuses me given many online references to "slow" Adguard service.

Can Adguard clarify all this?

Btw those who tell me Adguard is "Russian" implying not trustworthy, ought to remember Ed Snowden. If you can trust friendly Google, you can trust anyone !