Yes !!!! You are probably right as we can see that from 3.60 to 3.x anyway is possible a downgrade but... they didn't care about your downgrade cause can stay very quite about the fact that anyway you need official 3.60 or above to play the new games. so in POOR WORDS... $ony don't care about the downgrade but CARE to a 3.60 or above hack
Yes, it's available to preorder, but the original ship date wasn't until the 23rd of this month. Now they're saying there's more delays as they are including the NOR clip instead of having to solder the soft board to the mainboard.
There are some reports that CECH-25xx and CECH-3xxx models cannot be DG'd. Nothing confirmed though. These units are "supposed" to be un-hackable. If I were you I'd wait until it's confirmed or denied.