Asians are very concerned about safety. They prefer mid-large sized cars (but not oversized gas-guzzling SUVs) because of safety and comfort. Bkshopr's observation of slow asian drivers ages 35-65 fall into this category. The 1.5 generation and older group of Asians like good size sedans such as Camrys, Accords, Avalons, ES350 because they feel it is safer than driving the smaller counterparts (i.e. Civics, Mini Coopers etc). The ones who are well off drive MBs and BMWs for the prestige and show factor.
The younger generation (ABC and FOB included) are into smaller, sportier cars. At their age, there is no need for space so smaller cars will do just fine. Plus, they are heavily influenced by Japan's rice-rocket nation, thereby making civics, rsx/tsx, g35, IS350 and WRXs all very popular choices. Teenagers in San Marino, La Canada and Arcadia have more padded wallets and lean towards the 3-series and C-class over the Japanese cars. Regardless of what car they drive, this group of folks generally drive at or above the speed limit.
As for carpool lane violators? They should be fined for the first offense, heavily fined for the second offense and have their license revoked for the third offense. There's no excuse for abusing the system and/or putting other cars in danger.
Unfortunately I'm both asian AND female so by default I'm labeled as a bad driver. I completely understand that...generally speaking, asian women are horrible drivers.
Fortunately, I've honed my driving/parking skills quite well learning to parallel park on busy streets by UCLA while I was getting my ME degree.