Yep, being a first generation person who moved cultures from India to the US, I am pretty sure I was a lot more deferential, if not flowery when I began working here. It took me a while to internalize the “No, I think you're wrong” or the “No, there's no way I can do that by Tuesday, sorry” confidence that seems to come naturally to even new grads at their first job in the US. I also suspect that this held me back a bit early in my career.