Today I got a free license of NOD32 AntiVirus (Enterpise Edition) as a part of 3rd party free MVP offers. I had been using Norton Internet Security suite since a year and a half and one major thing I noticed after installing NOD32 was the smaller memory footprint and less CPU usage.
NOD32 is defintiely faster than Norton and I am loving it. I still need to test it for a lonegr duration to verify its claim that it has never missed a single virus/worm!
But one thing which always has gone against Norton is its speed: its too heavy (I have 1 GB RAM, 120GB HDD and 1.8GHz core duo processor).
I hope they work on it soon to avoid losing their market share to NOD32!