I go back and forth on these, I haven't had enough to really play the field though. There's some definit tug and pull with the concept. To an extent, there's an argument that a lager fermentation is good for an IP-whatever, because it lets the yeast character step into the background, by extension letting the hops step forward more. However, we all know IPAs are best fresh, and hop character degrades over time.
I completely agree that as fast of a turn-around lager as possible is best. In fact, maybe favor the lager yeast fermentation, i.e. temp controlled and cool fermentation, and care less so about the actual lager aging. Maybe just a couple weeks of lagering is enough, or maybe you don't lager at all. If you do lager, I think a major dose of dry hops at the end of lagering, not earlier, would be key. Taking advantage of the lagering time, I could see multiple doses of dry hoping being great. I'm playing with dry hopping my IPAs in more than one dose, but I do dislike, to an extent, that it pushes out my grain to class. Since you're already lagering an IPL, why not dose it three times with separate hop charges.
Lastly, I can totally get on board for a noble hopped IPL. I'm considering a "bohemian" IPA, a west coast style IPA but pounded with German hops. However, I think typical west coast hopping can play very well in an IPL if done right.
