Everyone has there own way of doing it. You stick to your way and let others do it how they want. You should perhaps doing more simran rather than making topics like this. God isnt only exclusive to the people who do simran the way you do. God understands people know matter what language they talk...no matter if they can talk or not....and whether they do simran fast or slow doesnt matter aslong as they are remebering god surely.
O and....
"Just imagine your brother/son saying thank you to you...Would you like him to say that in a repititive non stop manner and very fast or would you prefer the person say it nicely, slowly by actually meaning it?"
Stupid example,jus because they say it "slowly,nicely" doesnt mean they actually mean it. In the same way just because a person does simran fast or slow,sirf rabb jaanda....