If I may pitch in, with english not beeing my first language and all...
how could I possibly translate "in my experience" differently as "I have done it"?
In my experience I have seen many an Enstrom grunt off in the summer, three up and full tanks of fuel, marginally managing a positive rate of climb, within power limitations, but slightly over weight. (I was one of the pax). In my experience, I have also seen many an Enstrom grunt off in the winter, three up and full fuel with a spring in it's step, still within engine limits. The fact that I have seen this, would suggest that I have experienced it.