While Rags to Riches is the kind of horse who will run all day---and Magnificence is bred to be a sprinter-miler---perhaps we shouldn't forget that Magnificence was actually the consensus "fastest" and "most impressive" 3yo filly to race at the recently concluded Santa Anita meet.
It's VERY pre-mature to start talk about Rags To Riches as a great filly....she's basically just run the same race over and over since her sneaky super maiden win in Jan...and it's only been the continuous stretching out in distance that is making her look like she's improving so much with each start.
Sadly for her...they don't write Graded Stake races at distances any longer than 12 furlongs on dirt. She's not going to get another three furlong stretch out to 15 furlongs....She's finally going to have to cut-back now.
Let's let her prove herself...either by dominating the girls with fast figures, or by beating the colts at 9 and 10 furlongs...before we start talking about her like this.
I mentioned 3yo filly Jolypha, who came over from Europe, and was 3rd in the Breeders Cup Classic behind Ap Indy in her dirt debut. Here's another example of a filly giving a very good account of herself...this is Easy Goer's dam Relaxing running a competitive 3rd behind John Henry in the 1981 Jockey Club Gold Cup at 12 furlongs.
http://www.youtube.com/watch?v=bSISQou2aBA