We have previously published two articles on Google's QUIC protocol:
I encourage you to read those articles to understand what QUIC is.
Just as we were getting curious about how much traffic on the Internet is now QUIC traffic, and on May 15 an article was published that does a report.
The bottom line is - growth is out of this world! Here is a graph from that report:
One can only imagine it will continue to grow, especially since it is open source.
You can read more details in the report here.