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Studio flashes (whether monolights or pack and head units) often have a longer flash duration than shoe mount units - it's part of the reason that they can have a max output that is several f stops greater than a portable flash. However, I've never seen one with a duration of 1/30 second. My Paul C. Buff (White Lightning) units have maximum durations in the 1/400 to 1/800 second range (it varies with the power of the unit, and of course the duration becomes shorter when you set the flash at a lower power level). This is from memory, but those numbers are at least approximately accurate.
If you want to stop fast action (and a hair flip can be pretty fast, as can a cat), set your flash to half or quarter power (or still lower if you can get by), and you'll have good freezing ability.
Daschund, the specs on that website may be minimum flash duration, at minimum power. I know the older WL Ultras specified durations (at full power) slightly longer than 1/1000 sec, but maybe they've gotten things faster. If I can find the manual for my X-1600, I'll see if it gives details for duration at different power levels.