I've the Indianest sounding name possible and I can get 10 jobs in a month. Maybe, just maybe, it's because of your skills and experience?
Someone who is applying to Google in current_year is obviously in a different position. Not to mention other variables like a degree from Stanford etc, or being born in the US etc.
Obviously I am not saying that having an Americanized name is a requirement. I'm just saying that in the absence of other redeeming factors (I am no genius and have no patents to my name) it was a speedbump in the early selection process.
Having the Americanized name instantly lowers the difficulty though. Anecdotal, but I've seen this myself as well.