Error Identification: Understanding SC 3.3.1

Refer URL
http://www.w3.org/TR/UNDERSTANDING-WCAG20/minimize-error-identified.html
Second para, second sentence, under 'Intent of this Success Criterion'
reads "For example, certain technologies can specify that the user's input
must not fall outside a specific range, or that a form field is required.
Currently, few technologies support this kind of programmatic information,
but the Success Criterion does not require, nor prevent it."
I think there are the issues with the statement quoted above.
1. "Certain technologies" is not clear. Does it mean ARIA, title
attributes, etc.?
2. "Few technologies" is not clear either.
3. "but the Success Criterion does not require, nor prevent it" does not
sound correct grammatically and would be better served using neither / nor.
-Devarshi