jQuery can do the same as DoJo but looks like it relies on modules built by others to manage this.
What concerns you about that? Quality plugins are widely available, and you'll probably get more choices than whatever's packed by default with Dojo.

Personally I like jQuery's syntax, and have not encountered any notable drawbacks or missing functionality. Dojo's syntax looks verbose and unintuitive to me, but I've never really used it so can't speak to its value.