What cryptocurrency is the fastest in terms of reaching 100% transaction confirmation?

I've found sites like this that show that Fastcoin is the fastest at 48 seconds.

I think David Schwartz said that Ripple gets 100% confirmation in ~10 seconds.

Is Ripple the fastest, or is there another coin that is left out of calculations because of bias like that attributed to Ripple?

In this world of high frequency trading, is 10 seconds the best that can be done right now?