^^ Plenty of scope for bouncing around for ~month:
https://medium.com/@jimmysong/uasf-segwit2x-scenarios-and-timelines-1a540336c4be2017 July 23 18:00 GMT — BIP91 epoch finishes, BIP91 is activated
2017 July 23 18:00 GMT onward — Every block signals BIP141 (Segwit)
2017 July 27 or thereabouts — New Difficulty Adjustment Period Begins (2016 blocks). Every block will be signaling for Segwit.
2017 August 1 00:00 GMT — BIP148 starts, but does nothing since every block is signaling BIP141 due to BIP91.
2017 August 10 or thereabouts — Difficulty Adjustment Period closes with >95% signaling and BIP141 locks-in.
2017 August 23 or thereabouts — Difficulty Adjustment Period closes and BIP141 (Segwit) is active.
^ yes these timelines will be contracted since he wrote, because we're on 8.9 minute blocks/high hashrate
+ Chinese players - other than Wu Jihan - saying things about BitcoinCash:
https://twitter.com/cnLedger/status/889093703381299200Star Xu, CEO of OkCoin, on Weibo: BCC is just an altcoin; okex will name BCS (BIP91 coin) as BTC after 8\1.
https://twitter.com/ChandlerGuo/status/889146349710594049$BCC just shitcoin,$BTC still bitcoin