That's just BS. (IETF) QUIC was developed from scratch by an IETF working group. Google submitted its (Google) QUIC version as input, however the IETF version is not directly based on it.
> HTTP/3 (originally named QUIC) is an experimental transport layer[1] network protocol designed by Jim Roskind at Google,[2] initially implemented in 2012,[3] and announced publicly in 2013 as experimentation broadened
and then
> In June 2015, an Internet Draft of a specification for QUIC was submitted to the IETF for standardization
Unless you count 'developed independently by Google and then three years later submitted to IETF for standardization' as 'developed from scratch by an IETF working group', I fail to see how your assertion is backed by actual events.
For the record, SCTP has been standardized since 2000, and it was actually developed by an IETF working group.
> HTTP/3 (originally named QUIC) is an experimental transport layer[1] network protocol designed by Jim Roskind at Google,[2] initially implemented in 2012,[3] and announced publicly in 2013 as experimentation broadened
and then
> In June 2015, an Internet Draft of a specification for QUIC was submitted to the IETF for standardization
Unless you count 'developed independently by Google and then three years later submitted to IETF for standardization' as 'developed from scratch by an IETF working group', I fail to see how your assertion is backed by actual events.
For the record, SCTP has been standardized since 2000, and it was actually developed by an IETF working group.
[1] https://en.wikipedia.org/wiki/QUIC