That's very true, genetics play a huge part in how we grow and respond to gear. I have two pro's friends who compete at a top level and both are the opposite sides of cycles. One has never used over 1000mgs per week of total anabolics and regular uses just 500-750mgs he also goes into PCT, the other guy uses 5g+ 7g+ of total anabolics and bridges all his cycles together with his HRT dose which in many cases is a small cycle. It all depends on you but for the majority on this forum I must stress that using high amounts of gear wont turn you into the next pro or stood on the Mr O stage it takes a hell of a lot more interventions to get even close to that level and 99% of us will never reach it due to our genetics and lifestyles.
I came off gear for around 4 years when I was going through TRT and once I started to get my level right I maintained 240+lbs with the way I trained and my diet and my trt at the time was 125mgs per week. I'm 260lbs at the moment and only on trt and these days only cycle twice per yr if that I build and maintain via extreme training protocol and diet but many cant and some can it all depends on that individual but in all honesty I don't really think the cycle posted is extreme to the cycles ive seen many use but again everyone is different in their use.
But I cant stress enough for the newbie running high dose cycles doesn't mean you will be 200lbs+ 240lbs+ 260lbs+, all you should do is use as little as you can to achieve the goals you require, high dose to someone who has been using for 10+ yrs is different to a guy in his early 20's who has been using for 3 yrs.