flash isn't new for 3PAR
You write the article as if this is the first flash drives 3PAR has used. They have had flash for at least a year if not longer and were originally using STEC (if memory serves).
The original drives were judged by some to be too small (I think they were 50GB). In the grand scheme of things I think it was good for 3PAR to go to "slower" flash (assuming the cost works out) because of the sheer number of IOPS can overwhelm most controllers (even 3PAR) in dense configurations.
If your talking about 30-40k random read IOPS in an enclosure that can support up to 16 drives(F-class) or 40-drives(S/T/V class) your talking anywhere from ~480k IOPS in a single F-class shelf (not that they would allow this configuration) to 2.4 million IOPS in a S/T/V-class shelf(again not that they would allow this config) both of which FAR exceeds the maximum IOPS of the entire system as a whole.
The original SSDs if I recall right 3PAR limited you to 4 SSDs per shelf(I think 8 for the S/T/V class to maintain magazine level availability) or something like that, because more than that could overload the upstream controller ports.
As a potential customer (I don't have 3PAR stuff at my current gig at the moment but would love to have it) I rather have more(larger size), slower flash than less faster flash (costs being equal).