"Using the fastest and most reliable DNS servers for your particular location can dramatically improve browser performance.

Typically a DSL modem/router will request DNS servers from your ISP at each boot or be pre-programmed with a couple.

In either case they are likely to be reliable but not the fastest. A gain of say 15ms may not sound like much but will be multiplied up when you surf a typical site that does hundreds of lookups to "enhance your browsing experience" together with the current pre-emptive behaviour of browsers. " --ETP 19 Oct 2010"