It shouldn't matter if people call it "iMovie pro." What really matters is if it will help you complete your task. If so, and you're getting paid or some reward for finished project...shouldn't that be the biggest thing?I was in film school during the digital transformation so I got equal time on the flat bed and in front of a Mac running Avid (After the film had been digitized from BETA and converted). I found Avid so easy to learn I had picked it up in a 24 hour overnight editing session during final week. After school I sought out some hardware/software combo that would fill my filmmaker void with my cheap camcorder to no avail.
I had about ten years where I survived on Windows Movie Maker, then iMovie (briefly) and an old copy of Final Cut Express a friend donated to me. I flirted with Avid Studio on a PC as well during this time. I finally did a trial of FCPX right when 10.1 was released and scored a bunch of discounted AppStore GC and coupon codes to get FCPX and Motion for 240.
I still don't know how to properly use Motion after almost 3 years but I feel right at home in FCPX in a way that iMovie just frustrated my by its lack of power. I think calling it iMovie Pro is a little disingenous, maybe true at first release.
I think what ultimately counts on any program is intuitiveness and power underneath the hood (otherwise its just a WYSIWYG like iMovie). I have friends still on FP7 because they bought in so much so I feel grateful I was never in a place to part with so much cash and now have a useful program that is not recurring costs and receives free updates.