Struts vs. Spring frameworks - a request for information

[Jen]

Hi!

I'm a student at Rensselear Polytechnic Institute and am working on my
senior seminar for my Master's in Computer Science. I'm researching the
extensibility of two Java web application frameworks: Spring and Struts. I
would appreciate it if anyone with experience with either (or both!)
framework would answer a few short questions. My survey is at:

http://www.createsurvey.com/c/31128-0nVgEU/

and should only take 5 or so minutes of your time.

Thank you SOOOO much for your help in providing information for my research
project!!

Jennifer