Yes and it is quite a big one. However, you really don't have many true hardcore overclockers. Most of the populous who are "extreme" overclockers are end-users. They buy the phase change units, water cooling kits, torture racks, and push their hardware as far as possible. It leads to sweet rigs but is not really much of a deal regarding the overclocking itself.
The real grit comes from those that dig into overclocking and not stopping at being just an end-user. The areas that come to mind are sponsored overclockers, extreme cooling users / hardware nuts, and sub-zero builders. The sponsored overclockers are usually the ones using custom voltage distributors, soldering resistors, and receiving the top hardware companies like evga, gigabyte, can muster. They are a small bunch and dominate the top rankings at hwbot. You then have the extreme cooling users. These are the guys who make regular trips to coolgas to fill their ln2 dewer. The ones who spend hundreds of dollars on big metal containers and risk injury. Most of the crew I was with fill this spot. Then you have the sub-zero builders. These are the guys I mostly dealt with and they are my favorite bunch. Talking about building triple cascades, evap design, refrigerant choice, pressure balancing, sub-cooling, etc... was a blast. I fit this category in the end more then an extreme cooling users. I found myself spending more time designing sub-zero units then overclocking.
Most of my old buds went on to join the top US overclocking team. Shout outs to them since we started as a group many years ago and they are great guys. All of them nuts are pouring ln2 weekly and moving hardware around like meth dealers. Much respect from a retired OG.
I'll drop for now. Just writing a bit for those interested in the crazier overclocking world. Just don't join them. If you are the type who think guys are crazy spending money on these power rigs? Forget about it.