angular.element() uses jQuery if it is loaded prior angular itself, if jQuery is not loaded first it uses jqLite.
angularjs:angular did depend on jQuery and loaded it first, but with angular:angular this is not the case.
Change to angular:angular was introduced since v0.8.5 and this commit 8b0acbe.
So the issues is that angular.element() on its turn does not support arbitrary selectors and code like var backgroundColor = angular.element('body').css('background-color') would fail with:
Uncaught Error: [jqLite:nosel] Looking up elements via selectors is not supported by jqLite! See: http://docs.angularjs.org/api/angular.element
http://errors.angularjs.org/1.3.15/jqLite/nosel
A quick workaround would be to change angular.element('body').css('background-color') to angular.element(document).find('body').css('background-color') - this effectively uses the .find() method of a wrapped element, however this could be a problem for huge libraries.
As much as I like jQuery I would recommend not depending on it, since you have angular in place.
So the only problem here is - how to provide choice to people stuck with jQuery? In other words - how to effectively load jQuery prior angular, if this is required?