[davidgzach]

Really?  Wow.  I would have thought there would be a residual sweetness at that FG but I suppose that is very true in it depends on the design of the beer. 

Think a 135 IBU BW that starts at 1.115 and finishes a 1.028.

Damn, that would do it! 

[Joe Sr.]

It makes no difference where it started only where it finished.  Being a high OG beer doesn't matter.  If you were trying to carbonate something with a high FG, that would matter as the CO2 would need more pressure to get in to solution.  The thicker the liquid the harder to force carbonate.

That may be theoretically true, but in reality I've never seen it make any difference.

It's not beer, so not completely relevant, but I've seen the impact when carbonating root beer.  But that's completely unfermented with boatloads of sugar so whatever the gravity is would be extremely high.