Seems that my primary DNS server (hosted by my ISP) is very slow. This was the reply on one of my posts in this forum few days ago (where I asked about the speed of my site). I just wonder how can I test the speed of DNS server , I mean retrieval of DNS records for my domain.
If you have just changed DNS entries a day or so ago then there is nothing to worry, you just need to wait for the details to propagate and things would look fine.
It appears that the SOA timing that I've got was 534ms which seems rather slow but that is in relations to the US server where the DNSStuff is hosted. It appears that your server is hosted in the Czech Republic which might be the reason to the high ping results.