I agree with David 100% that to suggest that KAMP has been a 'failure' makes no sense; the combined 10.1 share total for KIIS (6.0) and KAMP (4.1) this past September is substantial proof that KAMP's arrival has only grown CHR/Pop's share in LA.
With the return to 6.0 and better shares at KIIS in early 2008, ratings which the station hasn't enjoyed since 1991 according to Birch, it made perfect sense for CBS (or anybody else) to launch a new CHR/Pop station in LA, and 'blowing up' KLSX was the correct choice, since JACK, KROQ & KRTH are all doing very well.
With superb 18-34 numbers to boot, it's been a spectacular success from day one.
Furthermore, since LA has been the most closely-watched and imitated radio market in the nation for decades, the decision by CC and other radio companies to launch tons of new CHR/Pop stations in numerous markets nationally over the past couple of years once KAMP's spectacular results gave those radio execs the unassailable proof they needed to do so.
This avalanche of launches shouldn't have surprised anybody, since CHR/Pop has enjoyed a great renaissance over the past 4-5 years, and especially among 18-49 & 25-54 females, as Sean Ross has pointed out in his newsletters recently.
The last time KIIS had a 10.0 share was in the fall of 1984 according to R&R, when top 40 radio was really enormous, and was really a songwriter-driven format.