http://i.imgur.com/3OSv46O.png
(GB v BABIP)
- yes extreme flyball pitchers have low babips, as expected
- yes it appears that extreme GB pitchers escape the trendline, like bubbles off the top of a carbonated beverage
- no it does not appear that extreme GB pitchers (upper 50's and 60+ % range) have lower than average babips. Rather, their expected babip looks to be about league average. Yes, this is lower than the expected babip of a non-extreme GB pitcher.
Honestly the GB% plot just kind of looks like a big blob, except for the FB dudes in the bottom left. The FB plot looks much more linear, unlike you:
http://i.imgur.com/Jsrg0bt.png