GuyBFF:
Thats an old myth and is incorrect. It stems from the fact that AL has a higher specific heat then Cu and was mistakenly interpreted to mean that Cu transfers heat to air slower.
Air is a fluid. Water is a fluid. No one questions that Cu conducts heat to water faster. How is air any different?
Ever been to Ars Technica?
[H]ardOCP article posted "Aluminum releases its heat faster" myth!!!
EDUCATED... aluminum vs copper, etc...
Al is used in sinks because it is cheaper, easier to work with and lighter.