It seems like the inter-region bandwidth test would be especially likely to be negatively affected by increased adoption of GCE. They lay a fixed amount of capacity, and if there's relatively few other customers, you get a proportionately larger slice of it. Hard to prove either way, but it seems that hitching your wagon to GCE based off of these performance numbers might not pan out for the long term.
one part not accounted for is that the wide-open internet, while slower and with more latency, is going to be pretty much 100% reliable compared to their dark fiber link between regions.
