Possible.. but not necessarily 100% failproof.
I don't want to get in too much details

But picture a web (after all, the name comes from somewhere) it might be that when you are asking for a certain site, your Internet Service Provider (ISP) servers are sending you on the long way or through the rush hour traffic to get your info..
The traceroute (tracert) is a tool used to know where your information is going once you put in a request (do a search, ask for a web page, refresh the current page you're on, etc..). That tool tells you every location (IP address) you went through to get to your final destination and how long it took to get there (in miliseconds)
By tracking the path and the times to get there, you can pinpoint where is it taking longer and thus know where we can improve. <= that's the part where you get in touch with the guy responsible for the router, and to find who it is, you use the whois command
Sorry, I couldn't resist, it's the 2nd level internet tech support guy in me talking. anyhoo, shift is over now, gotta jet
