I don't think anyone except high-placed BMW execs really knows if they have hit their sales mark with the X6. I'm sure it's much, much lower than the E70s, and obviously a very tiny fraction of the ubiquitous 3-series. But that does not mean it failed, since it was designed from the get-go for a 'niche' market.

As for my personal sightings, I used to see them only once every two weeks, but lately it's been one every 3 to 4 days. Even saw an X6 Hybrid on the GS Parkway last week! Don't know if they started production on those, it may have been a test mule from their Woodcliff Lake office.