Actually, it's a little silly to claim the Wii-mote is mechanically faster. You can only buffer moves so early, and both the C-Stick and D-pad are perfectly capable of doing so in adequate time.
Secondly, other than the obvious fact that ergonomic design is highly subject to preference, I remind you that the GC controller is a design that is very, very ergonomically refined as well, placing a large amount of controls in very easy reach. The GC controller is one of the best controllers, I feel, that the gaming industry has seen. It's only obvious fault is the absence of an LZ button. To claim that the GC controller has not evolved from Atari 2600 is completely absurd. The GC controller is the pinnacle of a repeated design, but it was a design that was repeated for a reason--because it worked.
The wiimote, even, does not stray from that design as far as you would like to believe. It maintains the same basic structure, at least 1 shoulder button on each hand, joystick under left thumb, and most action buttons controlled by right thumb, that the GC controller and most of its predecessors did. All the the wiimote did was separate them. It, too, suffers from a lack of a double trigger on each hand, again choosing Nintendo's quirky 3-total-shoulder-button design choice. Additionally, certain potential buttons on the Wiimote are inarguably out of comfortable reach. (1 and 2)
The Wiimote/Chuck combo, strictly speaking, does lack function, and to claim that it innately enables 3x faster reactions than the GC controller is just silly. GC controller is well designed. Comparing the number of buttons in direct reach alone, the Wiimote wins by 1, but in order to compensate for the absence of a C-Stick, without relying on the less-than-100%-reliable shake smash, you have to sacrifice 4 of those, leaving the remaining tally 4 to 7 in favor of GC.
The only huge difference is that you can separate your hands freely with the Wiimote/chuck, which while a nice benefit, is not really that big a deal. We've been holding "normal" controllers since we were kids, we're pretty used to it. Furthermore, there's the ever-great point that at a lengthy tournament, synching and battery life can become problems that the GC controller does not suffer from.
Edit: as a comment to the next post, I have given Wiimote/chuck a fairly solid chance. I've played with it a fair amount. I haven't thoroughly investigated the specific potential control quirks of the D-pad as a C-Stick replacement, as I have the quirks of the C-Stick itself, but I plan to eventually. My opinions aren't completely headstrong/overzealous, I don't think, but I will agree that I am, indeed, more familiar overall with the complete workings of the GC controller.