It finally stopped raining so I had a chance to test the AC5 sock.
On my block Vancouver standard width lots are 33'. I guaged the distances as I paced from house to house.
Well now my 580EXII's with AC5 socks the flashes fire consistantly with no misfires aprox 231feet. Consdering I'll NEVER need such ranges I'm extremely happy with the results.
My 430EXII with no sock consistantly 165feet.
Just documenting my useable ranges. Anyone skeptical about the "sock" should be confident that they truly work.