I was reading this post and I came up with a question that was not asked in it.
In particular, I wondered if taller people have the ability to gain more muscle in the same amount of time than shorter people?
It seems highly implausible to me that a 7ft person cannot gain more lean mass than a 5ft person in the same amount of time.
A possible reason behind this could be that tall people might have more muscle fibers (not larger) to begin with due to their size so their total rate of growth will be higher.
Note that I am not saying that the statement above is indeed true. I am just giving out a possible reason which if true, it could lead to taller people having a higher rate of growth.
I could not find research on that however, so anyone who knows something on this matter is welcome.