I had the same problem, with often quite exact 20 seconds delays. More details in this thread.
http://groups.google.com/group/google-appengine/browse_thread/thread/e5588268dff9b97a In another configuration, the delay increased to several minutes. Please star this bug. http://code.google.com/p/googleappengine/issues/detail?id=6022 -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
