In an interview article on InfoQ regarding the latest Struts 2.1 release it was mentioned that Struts now features the Java Templates Plugin. It basically provides the functionality of the "simple" theme implemented directly in Java instead of Freemarker. Musachy Barroso states in this interview that this makes the simple them tags render 4-5 times faster. The question for me is, do you "feel" the difference? Shall I avoid the Freemarker-based templates (at least as long as I use the simple theme)?