[eCa]

I would guess that most of the 12,000,000+ hits [0] on G has been written by natives.

[0] https://www.google.com/search?q=%22is+released%22

[TazeTSchnitzel]

Or even better, on Google Ngram viewer:

https://books.google.com/ngrams/graph?content=is+released%2C...

Hey, "is released" is more common than "has been released"!