200% seems too ambitious

Name: Michael Stenitzer
Email: stenitzer@wienfluss.net
Affiliation: accessible media
Document: W2
Item Number: Success Criterion 1.4.4
Part of Item: 
Comment Type: general comment
Summary of Issue: 200% seems too ambitious
Comment (Including rationale for any proposed change):
200% seems too ambitious for Level AA. 



Note: a quick check of accessible Austrian and German websites showed that only a small share would pass this SC.



It also seems inconsistent to require text to be scalable to a certain extent without taking into account the base level (original size of text). Otherwise it would be of advantage for websites with very small text-sizes.



This note also applies to SC 1.4.8. (last bullet)

Proposed Change:
We would propose to differentiate between Level AA (150%) and Level AAA (200%).



It could be possible to refer to the standard text size of the user agent (reference level: 100% of the default text size of the user agent). (This has to be discussed further).