Huddy told L.A. Taco that he began noticing the slight lean toward non-rhotic — meaning, "speakers don’t pronounce the 'r' sound at the end of a syllable" (think: Boston accent) — around the mid-2000s.
Huddy wrote on his blog of his small sample group findings:
"...despite the new accent’s association with the East Side, the only non-rhotic samples I collected were from Altadena and Sherman Oaks. All of the speakers I’ve found are middle-class white people (including hispanics and Jews), from middle-class white areas, with rhotic parents. All are under the age of 30."
As for the cause of the loosly dubbed "hipster accent," Huddy suggests a few theories, including a "hypercorrection of the long retroflex r’s evinced by stereotypical 'valley girls' and 'surfer dudes,' stereotypes."
Have you noticed this "trend?" Tell us.
[h/t Curbed L.A.]