Oh yeah, I definitely heard it (about 1730 EST yesterday). But again, it's radio talking about radio, so you can't trust it.
I'll never forget how WDTW AM, in its last days, still had ads for buying time on the station, knowing it was going silent (Yes, Trupiano told his audience about the pending shutdown weeks earlier, but he said it on his show, WDTW itself never said it).
Meanwhile, the thread above implies the bumper may just be fluff.
About Radio Disney's use of AM stations. One of the "theories" Radio Disney was operating under was that, whilst baby boomers were biased against AM stations, which where associated with conservative music, conservative news, and the "piggie establishment", while FM radio was associated with "freedom", album rock, marijuana and rejection of their parents' values, the children of the 1990's would not hold such a bias against the AM band.