All of my CDs are in very good condition, I don't go around mishandling my disks. Does this explain why Audiograbber gives the same results [as EAC] but 3 times faster ?

Yes. EAC is optimized for precision and accuracy, especially in the face of potential errors, not speed.

However, neither do I mishandle my disks, but they do simply age as you move them in and out of CD players. I'm not saying they oxidize or that the laser wears them out, but it's hard not to occasionally do something to damage them simply by handling them. And given that, it's better for me to use something that I know will give me the best possible results, even if it might be slower, rather than something that ought to give me the correct results, depending on a few criteria, about which I am significantly less confident. However, if you're confident that all your disks are error-free, then, of course, continue with whatever works for you.