CBTL, IIRc the german typhoon gsuit is a liquid filled (dont think it's water) g-suit. These have the advantages of not needing an aircraft water supply, being instantly reactive and you can drink the fluid in a survival situation! Downside is that they are heavy to wear (although the overall weight for the a/c is similar to the pneumatic system) and are somewhat prone to accidental puncture which leads to embaressing effects!
As for the red bull racers, the summary is correct, they "snap" lots of Gz, but even though blood may drain from your brain, your brain cells are sufficiently oxygenated to allow for 2-3 seconds of useful consciousness prior to the onset of blackout/g-loc, no matter how much G you pull. The sustained cornering is done at a lower g.
And iirc, most of the pilots involved are not ex-military at all. Most have been professional aerobatics pilots for quite some time (hence the age of most of them - compare the red bull lineup to an F1 lineup!)
Fantastic sport, shame about the uk one last year!