No, ragtime isn't 1920's, 1930's or 1940's.
http://www.scottjoplin.org/biography.htm
In fact, Scott Joplin died in 1917. His big ragtime successes were 1910ish and before.
I have no idea why the ISU gives these OD assignments and then doesn't penalize for not following them, but they don't. C&P aren't the only ones skating to ragtime.
At least C&P's costumes are a nice 1920's look. And the twizzle from shoot the duck is very cool, but maybe not worth the scoring risk, because it's darn hard.
So far, I've watched V&M, C&P, W&P and HM/C. If V&M's last lift were something other than a transition lift for PCS it would be illegal. I have no idea if there is anything illegal in these new extra lifts.
BTW, I enjoyed HM/C's OD this time. It's improved a lot since the GP, but it looks like they left it too late in the year.. I felt they were underscored. They captured the 1940's look very well, and the last lift was spot on in character for swing/boogie woogie. Weaver and Poje's effort left me cold-they were too nervous to really get into it.
I did find a copy of V&M's Viennese Waltz CD which was very lovely indeed, although they can do it a bit better when they have practiced more. Really, really nice, IMO.
Their Charleston had some good moments, particularly the first 30 secondx and the lift that counted was very good, but the F/W was kind of boring. I'm sure it will be all spiffed up and much better by worlds. The last lift looked illegal and didn't say Charleston to me, and the spin was not up to the high standard they set for themselves last year. They have work to do, but it's amazing how far they've come considering she couldn't walk a couple months ago.