Yes
It may be that Google doesn't even have places where they can take bug reports, and there is a serious reason why Linus might not know people involved in Google Mail.
There seem to be 2 groups of software engineers. The one Linus belongs to is the one trying to solve problems in the most elegant and simplest way. They think that knowing how to solve a problem is the most important part of software design, and a low number of lines of code is one of their top priorities. They know that, when they do a proper job, a small number of orthogonal features can provide a world of use to the user.
The other group puts its emphasis on development processes. They commonly start with hugely complex designs and frameworks designed to solve very general cases, often even much more general than what they want to actually do. The rationale for this is that, hypothetically, you could reuse those components. In reality, this rarely gets done, as they are not as general as the developer thought they would be, and changing them to be more general would mean changing them, which means changing your old projects.
Those two groups rarely talk to each other since their views are so different. Google Mail probably was done by the later group.
It's noteworthy that in the bigger scale of things, the first group is seen as the one that gets things done. UNIX is a typical example of a product of that first group. In contrast the second one seems to be responsible for many projects which try to solve a rather trivial problem in such a complex way, it's hard to maintain the code. Such projects also seem to "never get done" and continuously evolve for years without getting to a point where they are "done".