In terms of the NatSec - which has a broad overlap with InfoSec on twitter: pwnallthethings, shaneharris, jimsciutto, josephfcox, etc. all provide useful insight.

Broadly though, punditry shouldn't be used as a proxy for consensus.

I thought pwnallthethings is also in the Russians-did-it camp.

DNC hack: https://twitter.com/pwnallthethings/status/74319706484310425... "Gosh, I wonder what outlet Russian intelligence is going to use to launder these stolen documents."

Podesta Hack: 14 year old hackers vs. Russian Intelligence

https://twitter.com/pwnallthethings/status/81662561706823680... "How many accounts did this "14 year old" hack? About 1800. In 2015. Who were these accounts? Mil, govt personnel in the West, defence cos, journos critical of govt in Russia etc"

DNC hack connected to German government hack

https://twitter.com/pwnallthethings/status/75689252388524032... "Reminder: Malware control servers used in DNC hack were also used in the hack on Bundestag linked to Russian intel."

Influencing politics

https://arstechnica.com/security/2016/06/guccifer-leak-of-dn... ""There's also the fact that the hacker is publishing documents at all, which rules out lots of nation-states," the PwnAllTheThings researcher told Ars in a private message. "China, for example, would happily spy on the DNC to try and get the Trump oppo [opposition] research to support their foreign policy objectives, but they wouldn't publish the documents to influence the election.""

pwnallthethings has also gone through great pains to walk through the evidence (much of it public) and analysis that informs their opinion of attribution.

Twitter also has incredible utility in terms of the InfoSec and Quant communities. All the latest papers and exploits are posted regularly, something that exists nowhere else. It also extends across borders, I follow numerous Chinese, Italian, and Middle Eastern hackers who post code and associating write-ups regularly.

The same goes for stock traders, the network offers incredible insights.