I agree with what you've said and pretty much stated as much in the previous post
here.
The reason is that all the new calipers come in radial configuration. They are stiffer and come with more pads which improve initial bite.
I even went through all the different available configurations and ranked them. Here you go...
4 pad, billet, monoblock, Brembo X99.C4.60/61 (108mm 34/34) $1879
4 pad, billet, monoblock, non-Brembo PVM, Harris, AP, etc
2 pad, billet, monoblock, Brembo X97.37.60/61 (108mm 32/36) $1529
2 pad, billet, monoblock, non-Brembo PVM, Harris, AP, etc
4 pad, billet, 2 piece, Brembo none
4 pad, billet, 2 piece, non-Brembo none
2 pad, billet, 2 piece, Brembo 220.A016.10 HP performance calipers (108mm, 2 pin )- $700
2 pad, billet, 2 piece, non-Brembo none
4 pad, cast, monoblock, Brembo none
4 pad, cast, monoblock, non-Brembo none
2 pad, cast, monoblock, Brembo 220.A397.10 Brembo M4 Ducati 1098 (108mm, 2 pin 34/34) $500
2 pad, cast, monoblock, non-Brembo Honda CBR1000RR ‘08 Tokico (108mm), Yamaha R1 ‘06 Sumitomo (108mm)
4 pad, cast, 2 piece, Brembo 20.8343.11/21 Brembo P4 Ducati 848 (100mm 34/34) $300
4 pad, cast, 2 piece, non-Brembo Nissin (108mm 30/30) on Ebay cheap
2 pad, cast, 2 piece, Brembo Stock (65mm 32/36)- $400 Ebay- cheaper?
2 pad, cast, 2 piece, non-Brembo Stock (65mm 32/36)- Tokico
The more I read about the two piece billet Brembo's the less I like them. I'm thinking monoblock may be more important than billet. And I may end up with a 2 pad cast monoblock from Brembo.
As far as mounting, I think the radial mounting refers to the caliper rather than the fork. Many forks mount with the bolts axially like that. The difference is I'm adding a second set of bolts. The Ohlins R&T forks on my zx-10r also have a separate bracket to mount radial calipers.