Well according to their page - https://bitcointalksearch.org/topic/ann-xch-clearinghouse-freedom-by-blockchain-734674
It does say their coin is faster, but you have to think a bit logically here, counterparty tokens (xcp) run on the bitcoin blockchain, which means they run as fast as bitcoin. Thus clearinghouse is in essence saying their coin runs faster than bitcoin, which is totally fine but another thought is do you find any company unsatisfied with bitcoins speed today? Is there any companies just dying to get a coin faster than btc? You don't really hear about such things...thus if having a coin that runs faster than counterparty is a perk it's a pretty cheap perk in my opinion.