The speed of Skype versus Yahoo Messenger
Hello Harford,
Thank you for a  very good question, As we all know Skype services are almost the same as Yahoo messenger services and these are the most known and used communication services, I myself I use both Yahoo and Skype for communication and I have enjoyed their services.
Skype was introduced in August 2003 and it has again over 137 million members where as Yahoo messenger has 22 million and it available for anyone holding a Yahoo email.
Skype chat engine supports one on one chatting and group chatting where many member can be invited to join the chat room,where as Yahoo messenger engine also supports one on one chatting with powerful features like IMViroments, chatting background.
Both Skype and Yahoo messenger support video chatting but Yahoo messenger’s videos calls are not clear like that of Skype.
Skype is compact and extremely fast, its many features do not slow down the program and its easy to use, Yahoo messenger also has features but the program is very slow.
Therefore Skype is more powerful and faster than Yahoo messenger and does not take up much space like Yahoo which is bulky and slower.
The speed of Skype versus Yahoo Messenger
Ok, Recently i have Worked in a test of velocity of this messaging programs, I have viewed that the Yahoo messenger have more lag, Skype don't have lag, i have tested in a connection of 512 MB/s and 1024 Mb/s and this have been the results…
Concluding: The Skype is better, avoid lag problems and works in low velocity connections.