Yeah, I've heard debate about the time spent on Degobah and time spent travelling to Bespin. It can really go either way. You would think that the Degobah training would take a while even if Luke didn't stay the whole time. However, you would think that the trip to Bespin would be relatively brief considering Han is looking for someplace near to where they are in space to hide out from the Empire. But it's really up to personal interpretation since we have no way of confirming one way or the other.