It’s no secret that many users since CS4 have found the Adjustments panel detrimental to performance, in comparison to the modal dialog. So Adobe has reflected its diligence in creating vastly more intuitive software by modernising this option set. When confronted with the Photoshop CS6 interface you’ll see that the Adjustments panel is now fixed, and when clicking on an option the new Properties panel appears. Here all adjustment settings are localised in a single space, making activation far more rapid. There’s no having to quit out of the panel to choose another adjustment – simply select from the Add an Adjustment icon presets and the Properties panel will present the settings.
You may have also missed the omission of a Masks panel, which has now been scrapped and amalgamated with the Properties panel. By clicking the Properties panel, any masks in your image are subject to editing with Density and Feather sliders, as well as various other Refine options.