Don't forget that the actual wireless strength, between computer and router will be compromised by distance or location and as a consequence you will lose speed here, though if it makes a "big" difference to your workflow, I would be surprised indeed. It is always going to give a more solid performance, if you are plugged in via ethernet, but the beauty of wireless is of course in the freedom it offers.
I for instance am sitting out here typing this reply on the patio in the pouring rain, freezing my rocks off, sipping a glass of Pimms and watching the outdoor mains sockets arcing prettily. That freedom to operate away from a fixed network should stand me in good stead when the men in the white coats come back.
Conan
Sundays - it were ever thus...