This is the article I was talking about
https://www.t-nation.com/training/truth-about-bulking
25 lbs would not only be optimal conditions, it is also only for genetically gifted, meaning they are big boned (so predisposed to carrying more musclemass), between 16 and 19 and beginners. Either this or you are heavily roiding.
There is one more category that might be able to pull this of. I call them the re-beginners. Those that have trained heavily in their late teens and early twens, but then gave up due to work and families and stuff. Pushing 40, they find themselves completely out of shape and they return to the bar. Thanks to muscle memory, they also could achieve these type of muscle gains, because the foundation was put down in their yought.
No other is going to see these results natty and anyone who thinks otherwise is totally delusional. Those claiming to have done it probably gained a ton of fat they didn't notice as Christian explains in his article.
Christian's proposed road is the way to follow in my opinion, I have re-experienced how little progress I have made on more drastic bulk/cutting cycle gaining 1lbs a week. When I end the cut I will shoot for 1lbs weight gain a month instead which should garantee minimal fat gain and a fukton of progress over year.
The second mistake I made was not milking my cycles dry in the gym. I basically shot for an 8 week cycle, adding 10% to my lifts and stopping there. This was stupid. My cycles should be 12, maybe even 16 or 20 weeks and completely hybridized constantly adjusting frequency and volume to intensity. The first change will be going from 5 5 15 - 10 10 - to 5 - 15 - 10 with cardio on off days later further progressing to 3 - 12 - 8 if needed and lowering increments until I cannot add a single pound of weight to the bar.
In my opinion this is the road for all to follow.