I have tried to transfer bitcoin earlier this morning and I was shocked with the result. The transaction fee is much lower and the speed is a little bit faster. I don't if this is the effect of LN or just because of the low volume. Anyways, you can check it here https://steemit.com/bitcoin/@vhmcrypto/bitcoin-transaction-fee-and-speed-january-30-2018 and comment your thoughts! Have a good day!