I went to the local Starbuck's near work (W.Santa Clara/Market in San Jose, CA) and they had maple macchiato. I didn't find it at the Banff, Alberta, Starbuck's which I thought was weird, so to try it in Calif. is awesome.
It wasn't very sweet during the first few sips, but near the end all the syrup must have sunk to the bottom and it got very sweet.
A tall cup of maple macchiato was $3.15 US.
Have you tried it and what did you think?