Hal,
To put it simply the twist-on connectors are for DIY's.
I beg to differ there.
I only use them because there is no alternative for RG-59 cable used in Terrestrial TV systems over here.
And personally, I've often found that I can do a quicker job with the twist-ons.
I still prefer to use a crimp tool and radial crimp F-connectors.
Oddly enough, our F-con splitters and combiners here are 2.4GHz.
