Rationality probably doesn't have much to do with it. As an Osprey guy myself I worry about my future civilian employment daily.
Airlines generally don't give a damn about rotary-wing time, for example. Doesn't matter if you were Task Force 160 or a crop-sprayer.
On the other hand, helicopter employers don't care too much about fixed-wing time.
I worry about not having enough appropriate time to get hired at either.
The V-22 is primarily an airplane, but as far as the civilian world is concerned, I worry that a lot of employers will not know what to make of it, and so will discount much of the experience, unless that individual has another "in" to get through the first steps in the screening process, e.g. if an airline says, "minimums are 1500TT, 1000 multi-eng airplane," and I show up with my 3500TT including 1000 V-22 time, will I still rate an interview?
Lord knows it's a complex, high-performance, multi-crew, glass cockpit aircraft, which to me makes it a lot more relevant experience than say, a Beech twin. However, it's not "true" ME unless there's the possibility of asymmetric thrust.
It'll probably take the first few guys making it into the industry to make or break it for all the rest. Hopefully those guys are !!!!-hot, and not just some clowns who got out early because they weren't hacking anyway.
Me, I'll get my ME and ATP at a shake-and-bake school before I get out, but I won't have a lot of time behind those ratings.