Yes, there's truth in that. The problem is hugely exacerbated since I stopped disconnecting my pole after every job. I now tend to leave the pole hose connected to reel hose and wind it all in together. Thinking about it, the slick-connect probably doesn't help in this regard either as the connections are fixed and don't turn like hozelocks. However, regarding the green hose, it made no difference to it's behavior regardless- it just will not lay flat and causes a hazard.
This still leaves the issue of flexibility though, as soon as the sun comes out it becomes a pain trying to operate the univalve as the hose turns to putty! The green stuff does stay solid but that's all it does, from a positive aspect.