There are reviews with overclocked Intel CPUs - its the whole point of me going to the effort of putting every review I can find and every issue I can find into this thread.
Also, almost all the people I know who got K series CPUs never bothered overclocking them,and just got them for the higher default clockspeeds. The Intel 65W non-K parts tend to boost somewhat worse overall. Plus its quite clear by now even overclocking the AMD parts means nothing, when the lower parts are within a margin of error compared to the higher parts in terms of actual clockspeeds,unless 100MHZ actually means anything.
Edit!!
Also the maximum overclocks argument has never played well with me,as people never compare "safe" kinds of overclocks in forums,but everything at best possible case suicide voltage level. I have known people read into these claims on forums,and ended up with lemon CPUs.
I remember back in the day getting a Q6600 which had high VID,and it didn't overclock as well as what people were getting on forums,because people with the poor overclocking CPUs won't be generally boasting about them anyway.
Second Edit!!
An example:
https://hwbot.org/hardware/processor/core_i5_8600k/
https://hwbot.org/hardware/processor/core_i5_9600k/
Based on 11000 entries,the average overclock of a Core i5 8600K/9600K is around 4.6GHZ~4.7GHZ which is much lower than what you see on forums.
Gamersnexus had their own Core i5 9600K at 5.2GHZ against a stock and "overclocked" Ryzen 5 3600.
Their Core i7 9700K was at 5.1GHZ in their Ryzen 7 3700X review.
Nearly 8000 entries,has the average at 4.95GHZ:
https://hwbot.org/hardware/processor/core_i7_9700k/
That is normal people using a range of motherboards and different cooling solutions,so is as close to what an average enthusiast is getting from these CPUs over their lifespans.
If you look at the Ryzen 3000 CPUs,they are all at 4.2GHZ~4.3GHZ on average.