They are mixing apples and oranges, XC is trustless based on the signatures of all parties during the private transaction. Its not using MULTI_SIG N OF M Address's.
The transactions are SIGNED BY ALL PARTIES, if any of the outputs are missing, then it is not signed by all parties.
Here is an example of a private decentralized distributed multi-path transaction consisting of 4 parties. >>>
http://chainz.cryptoid.info/xc/tx.dws?229236.htmYou made me laugh again, where is the multisig address in this link?
The following are quoted from greenclover:
Multisig addresses usually start with a different letter than their regular address. For example, Bitcoin's regular address starts with "1", its multisig address starts with "3". Supercoin's regular address starts with "S", its multisig address starts with "C". Mammothcoin's regular address starts with "M", its multisig address starts with "b". etc. For XC, its regular address starts with X and multisig address starts with "4". Everyone can create a multisig address using XC client and verify yourself.