Yes that is the point. 
The thing with this feature in jquery is that we give to developers something I have missed for a long: a way to include external javascript and make the compiler validate it.

Normally they had to include tags in the .html file or in the gwt.xml. The most advanced approach I've seen is using a TextResource like Vaadin does for including jQuery and Highcharts, but this way just copy all the content in escaped string to the final compiled stuff.

With our approach we take advantage of gwt compiler features.