IP and Delay Question

I am designing a remote administraton client/server program that gives the server the ability to control and moniter his client machines through data that is transferred through the winsock control.

I have tried to send data to 127.0.0.1 and it loops back to me and I get it virtually instantly, but I am not sure if there will be more delay when sending data to a computer that is in india or something.

Also, I want to know if the delay of transfer will be greater with different IP addresses. I don't really understand how IP's are assigned, but I just want to get information on delay in data transfer.

Delay, yes. You can test the delay by ping'ing the host or doing a traceroute to the host, BUT

There is nothing deterministic about the internet. Results will vary from ms. to ms. depending on millions of factors.

I wouldn't worry about it.