That's because this isn't a new slim model, just a minor internal revision. These never got big fanfare. There's like 10 different PS2 revisions for example and

That's because this isn't a new slim model, just a minor internal revision. These never got big fanfare. There's like 10 different PS2 revisions for example and a similar number of PS3 revisions. Highlighting that you removed a handful of LEDs to save 43 cents on each unit isn't usually done. Occasionally there is a bigish difference like the original PS2s having their PCMIA slot replaced with a HDD slot or the slimline PS2 getting an integrated power supply near the end but often it wasn't visible unless you opened the unit and compared. The only time I remember people seriously caring was for the 360 where every new revision was speculated to be the fix for RROD.