Defining "rapid" in Rapid and Direct Feedback SC language

Hi,

A couple of thoughts came to mind during the roughly 4 hours spent
attempting to find the ETSI standard where "rapid feedback" equates to 200
ms.

1. Given potentially numerous environmental factors (e.g. testing on a test
server behind a firewall VS on the production server, network lag, peak VS
low server load, etc.), can a reliable test for "rapid" defined as 200 ms
be conducted?
2. Perhaps "rapid" needs to be defined in non-time terms like "success or
failure information is included in the next content provided to the user,
in the users modality, and may or may not be the only information provided
immediately after the user initiated action."

I would like the thoughts of other task force members on this point before
completing changes to the Success Criteria file.

-- 
Regards,
Kurt Mattes
Accessibility Program Manager
Deque Systems
610-368-1539