The B&H stats are indeed a misprint. It is ~2.2. sec at full-tilt. 0.5 sec recycle on a 400WS+ battery system would be sweet, but would require an ENORMOUS amount of current from what are really glorified (and overpriced) 12V motorcycle batteries...
I owned a dual-head A kit but parted with it. Simply didn't like the head and EL-adapter construction quality (especially given the replacement price of the head) and the utter PITA it was to try and use it with mods outside the small and light such as a Mola Demi.
The Q-EL adapter's swivel needs the 'Manfrotto' mod to avoid creep and then once modified, the adapter's 'L' shaped metal body flexed like a limp noodle with the Mola attached if you so much as breathed on the dish. First time I mounted the Mola was the last. Wife walked in, took one look, and "...that doesn't look very safe...". Some folks on POTN have had success welding supports onto the adapter.
The adapter also sets the Quadra tube back from the base of a dish/softbox which can cause some users of large and shallow boxes or BD's problems with the light being too fwd biased. If you could DIY a mount to clamp a Quadra head directly onto a Mola Setti (has own integrated handle/swivel mount) so the weight was off the light/adapter and the Quadra tube wasn't set back from the base of the tube, it would be fine. Some folks have used a Eli DO on a modified Quadra, it would be studio only - and one with closed windows and no fans ;>
Use it with it's own reflectors or small (and light) softboxes it's a strobist's dream. Beyond that you're literally trying to get the tail to wag the dog. The molded plastic heads, very frangible umbrella tube design (engineer should have been shot), weak swivel design and the iffy EL-Q adapter, while the latter may physically fit any Eli bayonet, all combine to ensure the Quadra won't kill too many Ranger sales.
Thought about using a Ranger head with the Q pack, but said 'screw it', dumped the Eli gear (had some QC/construction quality issues with my DLites and BXRis) and moved to Acute B and Compact 600s.
That said, the Q does offer very snappy flash duration and nice power in small package and would excel in the niche it is targeted at. The new Quadra RX is an odd one - adding what seems like more studio features (RX USB control) into a pack designed for more strobist-like use (shoot and scoot)??.
The Skyport Trx works fine with a sync cord. Inserting the sync cord disconnects the hotshoe contacts on the base of the Trx. Though I use Profoto now, I still use Skyport for triggering - but am moving to PW.