Do you know that Google and Microsoft had a secret agreement when Microsoft sued Google because of Li Kaifu? I believe it is about hiring process.
I did apply for these 3 total different companies and they responded quite quickly. But after I received the first email, it was silient. After I sent email to them querying the satus, I received 3 confirmation email all most the same time. 3 email had similar timestamp that is 6 hours ahead of pacific time. These 3 companies are all located in Silicon Valley (Pacific time). I just can't explain it. I am pretty sure those 3 emails would come from the same person.