ES - Medicine Man and BATUK immediately spring to mind to disprove your point for the Army, and the extended OOA deployments in the ME for FJ Sqns also point to the RAF having to embrace it. The COUGAR series of Exercises will also see units routinely deploying every Autumn (and thus training Spring-time).
As for training cycles - perhaps the process needs to change. I'll grant you that I don't think the RN trains enough, but 18 months for a Bde to generate is far too much.
Don't forget, 660/3 relates to time out of base port, not time on deployment.