While I agree with most of your post, the top 20 is still mostly made up of dance songs and the collabs are still pretty big on CHR. Auto-tuned dance music does not seem to be on its way out and the collabs will most definitely not be gone in 2 or 3 months. Maybe 2 or 3 years!
Adele is an anomaly. Her second single is a needle in the haystack of the Dance/R&B/Hip Hop/Collabs type songs that are currently dominating the CHR chart. Her 1st single RITD and her third single coming out, Rumor Has It are songs that have a groove and you can dance to them. They have an R&B flavor to them. My DD told me that Adele "was a white girl who sings like a black girl".
The current top 20 at CHR:
1 1 GYM CLASS HEROES Stereo Hearts f/Adam Levine
2 2 ADELE Someone Like You
3 3 MAROON 5 F/CHRISTINA AGUILERA Moves Like Jagger
5 4 DAVID GUETTA Without You f/Usher
4 5 COBRA STARSHIP You Make Me Feel... f/Sabi
7 6 LMFAO Sexy And I Know It
8 7 RIHANNA We Found Love f/Calvin Harris
6 8 FOSTER THE PEOPLE Pumped Up Kicks
9 9 DEV In The Dark
12 10 JASON DERULO It Girl
18 11 KATY PERRY The One That Got Away
11 12 LMFAO Party Rock Anthem
10 13 LADY GAGA You And I
17 14 BRUNO MARS It Will Rain
16 15 KELLY CLARKSON Mr. Know It All
22 16 FLO RIDA Good Feeling
14 17 BAD MEETS EVIL Lighters f/Bruno Mars
21 18 NICKI MINAJ Fly f/Rihanna
23 19 BRITNEY SPEARS Criminal
20 20 ALEXANDRA STAN Mr. Saxobeat
I'm pretty sick of most of this type of music, but I fear it is here to stay. There are plenty of artists out there who are putting out music that is closer to Adele's type of music, but radio is not playing them. Unless your name is spelled A-D-E-L-E, the chance of radio playing something new and different doen't happen very often. >:(