How to check if the segwit2x fork was adopted? SegWit2x was scheduled to happen today at BTC block 501451 (http://b2x-segwit.io).

How do I check if the fork was adopted and by whom?

Electrum wallet docs (http://docs.electrum.org/en/latest/hardfork.html) say the app will detect a blockchain split, but mine didn't notice anything. Does this means the fork wasn't successful?
Here's an official announcement of the fork having taken place. According to the official website the fork is planned for block 501451 which has indeed occurred about 8 hours ago. 

The stats of their mining pool don't look to promising though, but it might be too early to tell. Also keep an eye out on their subreddit and other social media.