BRD macro

[Drakkur]

A bard friend and I tested extensively and noticed that around every 5-6 GCD's I would lap him and gain an entire Heavy Shot GCD when I was using the base ability and he was using a macro.

I just did 6 1 min tests (don't have time to do 6 5 minute tests), because you saying "5-6 GCDs you gain an extra" should be show in a 1 minute test. For me, the results were incredibly insignificant. At ~58-58.5 I was hitting HS #24 with the macro, at ~59.5 I was hitting HS #25 without the macro. These #s were consistent whether I used the parsers built in timer or my iphone's stop watch/timer.
The grossly exaggerated bonus you pointed out, definitely does not exist. I will give you that I gained 1.5 seconds on my GCD over 1 min, in the context of practicality in raids, its minute.
For what its worth I use a mechanical keyboard with cherry MX red switches.
Reasons why you should only do test on one BRD:
Human error and latency to the server.