Bitcoinist.net:

ethereum block times

According to recent statistics, after the Muir Glacier hard fork, Ethereum block times dropped by 25%, going from 17 seconds to 12.69 seconds.

The Ethereum blockchain has seen a lot of activity in the past month. After two hard forks and numerous difficulties, the project is once again making headlines, as recent statistics show that its block time has now lessened by 25%.
Before the Muir Glacier hard fork, which took place only days ago, the project needed around 17 seconds to complete each block. Now, the hard fork which once again postponed the time bomb also managed to reduce the block times by 25%, causing each block to only last for about 12.69 seconds.
One consequence of the change is the fact that Ethereum‘s supply is likely to grow by about 25%. In other words, the effects of the time bomb delay are already quite noticeable….

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Source: https://bitcoinist.com/ethereum-block-time-reduced-by-25-percent/