> GPL doesn't set a standard time limit for providing the sources, but that doesn't mean they can delay it indefinitely.
I wonder actually what a court would say here and if "doesn't set a time limit" could mean "the source needs to be made available immediately". IANAL.
In the US? Under the current political and economic circumstances? Against Google's legal department? I wouldn't get my hopes up...
A reasonable interpretation would be that they had a previous process that eliminated delivery latency and required no manual manpower for responding, so changing it has been done to induce artificial friction, against the intent of the license.
Not that the intent of a license can be enforced.