On the Curbed LA website: The score has been going up based on Walk Score's calculations of access to neighborhood amenities like supermarkets, parks and schools. Most walkable neighborhoods?
1) Downtown LA = score of 93
2) Chinatown = 91
3) Koreatown = 90
4) Pico-Union = 90
5) Mid-City West = 88
6) Harvard Heights = 86
7) Pico/Robertson = 86
8) Westlake = 86
9) Hollywood = 86
10) Sawtelle = 85
Bike score is still at 54. Transit at 49.

Read more. But also, the press release notes:
•    Between 2001 and 2009, the average annual number of vehicle-miles traveled by young people (16 to 34 year-olds) declined 23 percent.
•    The average American spends $9,000+ per year on their car, making cars the second largest expense for most households — more than food, clothing and health care.
•    The average resident of a walkable neighborhood weighs 8 pounds less than someone who lives in a sprawling neighborhood.