Bro, it's cultural most Asians are like that based on my own set of experiences and observations from other Asians (Filipinos, Koreans, Japanese) that I studied with, work with in Canada and elsewhere. We're supposed to let our work/results do the talking and we'll get recognized, noticed by our peers and bosses and finally be promoted or elevated in positions of greater responsibility. But obviously in the western dominated world and culture this approach can't and will not endear anyone to greener pastures or opportunities. This trait of passivity is one of the key reasons why Indians outcompete Asians (Chinese, Koreans, Japanese, Vietnamese etc.) in getting ahead or promoted at various North American companies.
Yes, there are studies which confirm this.