How many have now updated to 0.13.1, they need at least 95% don't they?
Do we know if all the wallet providers are supporting the upgrade?
SegWit needs 95% of the miners to upgrade. You can look at the block version to see if the miner has updated (version is x'2000002' for SegWit). So far, I'm seeing around 1 block in 10 that has the SegWit version. So there is a long ways to go yet. I already have a SegWit transaction in the blockchain just waiting for the support to be locked in (you can create a P2SH-P2WPKH transaction but you can't spend it yet).