All,
Although some leaders like Slush believe that BIP 91 is a bit rushed, more than 90% of the last 144 blocks have signaled in favor of the proposal.
BIP 91 plays a critical role in more than one scaling strategy. It was designed to prevent a chain split from occurring should miners disagree about whether to activate SegWit2x or BIP148, a user-activated soft fork. BIP 91 does not rely on set dates to activate its rules, but instead counts on having a certain amount of hash power.
Once 80% of blocks are signaling for a significant period, then blocks which are not from pools which support segregated witness will begin to be rejected. If there are any such pools getting blocks, this will be problematic for them, as it appears that BIP 91 is definitely going full steam ahead.
Read more :
https://www.cryptocoinsnews.com/bitcoin-bip-91-signaling-near-100/