Yes, but this non-subtle change on KRTH was unnecessary. They dropped their classic jingle package, which, IMO, was one of the best in the country, and they have cut out the old stuff with surgical precision, instead of blending the changes. Wrong, wrong, wrong. They could have handled this with much more moderation. But consultants and corporate programmers don't understand this. My favorite LA radio station no longer exists, and while they are trying for a new audience they are losing an audience as well. You can argue that the new audience is more profitable, but frankly, there is really no new audience. It is done.
As BigA mentions, the "old" audience was aging so that most of it would have been over 55 if they had not started making significant changes when Rick Thomas got there several years ago.
KRTH does not have "consultants". The CBS LA cluster is one of the more autonomous, locally managed and controlled operations in the US. Yes, any station or cluster reports to their corporate office but the fact is that the moves have been enormously successful.
The jingles, the presentation and the music were for folks who were teens in the 70's and who are now out of the sales demos. They needed a clean break with "your parents' radio station" and that meant a refresh of the imaging from top to bottom. They made it reflect the LA that is now 70% ethnic and/or immigrant of today; It's not where yoku can play "Surfer Girl" any more.
And KRTH is not "trying" for a new audience: they got one. The station is now much higher in 25-54 than it had been for the entire decade before the changes, and that is a bankable improvement.