First the article says that a former US national security advisor thinks twitter should get a Nobel peace prize. There's a long way from that to credible speculation that they'll get one. There are no claims from inside sources, a claim that PG thinks Sam Odio should get the Nobel Prize in physics would be equally credible.

Second the committee that decides who gets the prize is secret and doesn't leak information. And it's in Sweden. The article qoutes US sources that have nothing to do with the process.

Third historically nobel prizes are only given once it's proven that you weren't wrong, primarily for political reasons. Twitter isn't quite there yet, they may well be bankrupt next year. There are exceptions to this rule but they are rare.