Your theory is as good as mine when it comes to some new domains registered on Friday -- Gary Price, as usual, digs these domains up by using his amazing research skills -- nothing can get by this guy! What do you think they could mean?
If I was to guess (and I mean guess) -- they could refer to internal employee testing. Many companies use training software to bring new employees up to speed. With Google's rapid growth (across cities and countries), this could be their way to maintain break-neck hiring speeds and keep knowledge transfer to new employees as smooth as possible.