I'm actually a little confused about what processing speed really means. DD learns fast but her work tempo is slow. Her memorization skills are incredible, but she is absentminded and off task more often than I'd like. It takes her forever to get out of the house, but she always completes tests on time. She goes off on tangents but is highy accurate. She reads very fast with great comprehension, but takes a while to produce beautiful writing. So...?? (I have no numbers for her on processing speed as she took the RIAS.)
Wait, are you talking about my child? LOL, that is an EXACT description of my DD.
I am also curious about this, considering my DD's two highest scores are PSI and WMI. We expected her to have a high working memory IQ, just from knowing her and how she operates, but the PSI was a bit of a surprise.
She has always been an incredibly fast reader, from the time she taught herself to read at 4, but I have never correlated that to PS. More recently, she has really started to enjoy timed activities, and she does seem to have a distinct advantage in that area that I would attribute to her PSI.
She also both absorbs, and memorizes, most of the auditory instruction in the classroom. Many times, she will tell me about a topic they are discussing as a class (Eleanor Roosevelt, human body, etc), and I can tell that she is repeating word for word the way it was told to her. Months....years later, she has still retained those facts the way it was first presented to her. Which makes it extremely hard on the rare occasion that a teacher tells her something that isn't 100% accurate!
On the other hand, her VSI is much lower, at 106 (she is in the 140s for everything else).