As PCRR/Dave has pointed out, dispelling myth one of DCS wiring is equal length wires.
Myth 2 is having to use a distribution block. I have worked on layout rebuilds where the owner's used bus wiring with feeds and have no problems with DCS signal.
I have spoken with professional layout builders that use bus wiring and the customer wants DCS.
Ask Marty Fitz, his layout has not changed in twenty years. He operates DCS and Legacy with bus wiring. Check out National Capital Trackers and the North Penn O Gaugers that operate DCS and TMCC/Legacy on a huge modular layout, which is definitely bus wiring with blocks.
So, to Mike G., I say run bus wiring for your around the wall layout. Divide each loop into four blocks for the main and one for the reversing loop island. Then you can run any system that you like.
I can't say that I have dispelled Myth 2, but there is a lot experience that proves otherwise.