I agree, just wanted to see if anybody else had the experience
I have been using OpenDNS in the DNS settings of my SME Servers, I have found that the Internet Browsing has slowed ...
Open DNS does have some issues with some ISP proxy's. I had alot of issues via a pecific ISP till I returned to using the ISP's DNS. I subsequently learned it was a known issue.
SME Server already has an excellent caching resolver.