Basically I think allowing the user to specify whether or not they want to see every file being zipped/unzipped/copied/moved is a good idea. The zip and copy tasks are taking up a lot of unnecessary space in my build log because of logging individual file operations. Whats worse, the delete task has the option (verbose), but it doesn't work!
Alternatively there is a <quiet> task implementation here : https://sourceforge.net/p/taskcall/code/21/tree/trunk/quiet/src/main/Quiet.java It makes it possible to filter the log level when invoking nested tasks, for instance : <quiet level="warn"> <echo level="info">Ok !</echo> </quiet> Will effectively not log anything.