I agree that is what the parent is talking about, however in the context of GCE, Google Cloud Services which include App Engine and a whole slew of other services are relevant. Given that if you've used them, there are integrations and even shared admin areas/dependencies, it is very relevant to talk about how other services perform in the Google Cloud.

While I agree, it seems relevant to mention the experience with it anyway because it seems some people's poor experience with GAE might have actually prevented them from trying GCE. At the very least it helps answer why some people use AWS instead of GCE.