I've been wondering about this for a while and it came to the fore this weekend when switching from a Head Liquidmetal to a Wilson n6.1 Tour 90 (demoing both). While I noticed the Tour 90 had a smaller sweet spot than the LM, when I hit in the sweet spot of the Tour 90 it felt better than any shot with the LM, no matter how well hit. I'd describe it as the LM's sweet spot was larger, but diluted and the Tour 90's was smaller but concentrated. Does this make sense? Has anyone else experienced this? The LM was more forgiving overall -- more shots went in, etc. -- but when I hit the ball in the sweetspot of the Tour 90 the ball did exactly what I intended and went exactly where I intended. I learned tennis with wood racquets -- the Kramer Auto mostly -- and that may have something to do with it. I just felt a greater connection to my abilities or lack thereof with the Tour 90 even though I, over all, probably didn't play as well. This is not specific to the LM or Tour 90; I've experienced this with other racquets, it was just more noticable since I used them back to back. I think something is lost in expanding the "sweet spot" into an ever-increasing "sweet zone".