Wii graphics better than expected?

A Digg commenter regarding the impressive Splinter Cell Wii graphics: “Over time, console developers learn little tricks to squeeze as much power out of their hardware as possible (just look at graphics at Xbox/PS2/GC launch compared to how they are now). Nintendo is at an advantage with the Wii’s hardware being similar to the GameCube’s; all those little tricks still apply so they can still use them to create impressive graphics, but they also have the added power of the Wii (faster processor etc.) to add on top of that.”

While the statement makes sense, is it just wishful thinking on the part of Nintendo enthusiasts due to a less powerful Wii?