I suspect these sudden weird early game queen buffs are a pre-emptive measure to handle one of the early game cheese possibilities that is going to be introduced in HOTS, so they are seeing what is feasible for WOL that won't disrupt the balance so much.
No one ever has to wait for observers to finish before starting colossus production. If you are going for a colossus timing and your bay finishes whilst you still have observers in production, its a terrible build.
okay its not that much significant, but its enough for those times when tasteless and artosis yell "OH THE OVERLORD IS HE GOING TO SEE IT" and the answer will probably be 'yes'
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