Yes, I DD the jeep, well, almost daily, several days a week. I can run 70mph no problems, can actually accelerate in 5th gear due to the 5.38's.
The front spool is invisible on the road due to locking hubs, and I can disconnect the drivers side axleshaft when the hubs are locked for tight trail turns, engage the driver's side axleshaft for true 4wd.
When I had my D30 and lincoln locker (spool), I could run highway speeds no problem, invisible in 2wd. In 4wd I was actually in 3wd with the drivers side axleshaft pulling until I engaged the disconnect, then true 4wd.
Here are some pics of my D44 disconnect before the spool and 5.38's: