Bear cannisters are the only way to go
This past weekend another hiker told me that on the night of 7/17, half of the bear bags on the cable at Lake Colden were taken by bears. He happened to be one of the lucky ones, whose food was not taken.
And as Daxs mentioned, a bear bag hung at Feldspar Lean-to area was ripped open by bears on the night of 7/18.
Lets face it, we're feeding the bears by continuing to use bear bags. The bears have got it figured out. I'm really glad to hear that cannisters are going to be required soon, because its the only way to go. I realize that the expense of buying/renting a cannister, and its bulkiness are drawbacks, but losing all your food deep in the backcountry can quickly end a long planned trip. While we were out there, we met lots of backpackers who had very little or no knowledge of bear cannisters.
For the sake of the bears and the backpackers, we need to get the word out to start using cannisters NOW, even though they are not required.