https://www.gamasutra.com/php-bin/news_index.php?story=21886
That Gamasutra link doesn't mean anything. Persona 4 came out in 2008. PS2 was a dead system by then in terms of SW and most everyone moved on. Topping the chart means very little.
HW sales of December 2008, the month Persona 4 came out.
Nintendo DS - 3.04 million
Wii - 2.15 million
Xbox 360 - 1.44 million
PlayStation Portable - 1.02 million
PlayStation 3 - 726,000
PlayStation 2 - 410,000
Top 20 software sales:
Wii Play w/ remote (Wii) – 1.46 million
Call of Duty: World at War (X360) – 1.33 million*
Wii Fit w/ balance board (Wii) – 999K
Mario Kart Wii w/ wheel (Wii) – 979K
Guitar Hero: World Tour (Wii) – 850K*
Gears of War 2 (X360) – 745K*
Left 4 Dead (X360) – 629K
Mario Kart (NDS) – 540K
Call of Duty: World at War (PS3) – 533K
Animal Crossing: City Folk (Wii) – 497K*
Wii Music (Wii) - 487,000[2]LTD of 865k and then subtract Oct and Nov months)
New Super Mario Bros. (NDS)
Personal Trainer: Cooking (NDS)
Fallout 3* (X360)
Club Penguin: Elite Penguin Force (NDS)
Link's Crossbow Training (Wii)
Guitar Hero World Tour* (PS2)
Madden NFL 09* (X360)
Call Of Duty: World At War (Wii)
Shaun White Snowboarding: Road Trip (Wii)- 366k [3][4][5]
It doesn't even show up on the top 20. This game you're saying which was super successful at release.