No mention of processor speeds, just like iOS devices. This is the new normal now for Macs.
Beyond that though, processor speed is increasingly useless as a single metric. This thing has eight cores, half high-performance and half high-efficiency; GPUs are everywhere and doing seemingly everything; and RAM is always important. The speed cannot be summarized in Hz, but in standardized tests and "The stuff you care about is way faster now."
Clock speeds are another metric that would cost Apple nothing to disclose.