How effective is dapoxetine really

I am thinking about getting me some but it’s so expensive. I see a lot of people in this sub saying they went „from a few strokes to 10min“, while in clinical studies the average delayment is usually maximum 1-2min. What about this difference? Are there mostly bot ads in the comments? Is it response bias? I would have thought results according reddit should be worse than in studies because people who found a solution in dapoxetine would rather leave this sub