It does seem a bit convenient, but on the other hand if you put a positive spin on it, in the ideal world you would want investigations of the big n tech companies to happen at the same time and not play "favorites" by doing one first and letting the others benefit.

Whether or not they violate existing statute, they all seem to be abusing their power in various ways. (Google and Facebook with personal information, ad handling, and interoperability, Apple with walled garden and no-competition apps, et al.)