At this point I believe exchanges that are tending towards the BCH side are resisting towards SegWit.
Notice how Coinbase, which recently added BCH, is resistant towards Segwit. Bitpay, which was a supporter of the 2X fork and is planning to add BCH, is resistant towards Segwit.
Meanwhile, exchanges like Bitstamp who are heavily invested in the original Bitcoin add Segwit almost instantly (Bitstamp added months ago).
RE: Bitcoin fees as high as $50, transactions still slow to confirm, new messaging system on BlockTrades