Well, technically he said they EXPECT to ship next month, August, and the rack, PROBABLY a few months later;-)
Maybe I read too much into that but I take it to mean there are some dependencies on other sources/suppliers/etc. that don't have committed dates that are set in stone at least enough for him to be able to actually speak to a definitive a ship date - which is completely understandable. It could ship later or perhaps, if things go well, even earlier.
It's interesting to see how companies handle these launches. Maybe they could open Line 6 stores and give an exact date and we can spend the night standing in line hoping they don't run out before it's our turn. :)