If Asus has made retailers aware (which I believe they have)
You guys are confusing PR with a formal change in a product's specs. Asus Taiwan had a "press conference" and Asus Sweden "issued a statement."
Following recent discussions on GPS function in the Asus Transformer Prime, Asus has issued a written statement in which it writes that there are "limitations when using the GPS function" and that the unit's metal case can affect the GPS module capable of receiving signals from satellites. Yesterday, among others, Asus in Sweden removed the "gps" from the specifications on the website of the Prime and it's something that Asus will do or have done in other countries
http://www.mobil.se/articles/asus-metallskalet-ger-prime-gps-problem-1.497720.html
These are just some of the things that go in to changing a products specs once it's been sent to resellers:
1) Remove or add a note that says "devices sold after 'X' no longer support this feature" to all traditional and online collateral.
2) Modify all future packaging, product identification, and support material to reflect the change introducing new document inventory numbers to avoid confusion.
3) Edit all previously released marketing materials (videos, stills, editorial) to ensure the feature is no longer present.
4) Identify at the retail level what materials reflect the feature. Provide resellers with formal notification, a positioning statement, and guidelines/tools (overlays, redaction methods, etc.) to modify product they have in stock and any POP materials they're using.
5) Have internal resources audit resellers online sales and promotional pages and do mystery calls to random B&M outlets to ensure they've complied with required changes.
6) Modify support and repair channels to effectively support customers with pre/post change products including proper positioning statements.
There's more but you get the point. There are people on the forum that work for BB, GameStop, Staples, and OfficeDepot. I'm sure they would have posted something if the above (or similar) was initiated by Asus. The fact the C1's still have GPS on the box would indicate Asus hasn't done a lot.
This is product marketing 101. It happens frequently and is dealt with the same way whether it's a tablet or a toaster. And I'm sure what Asus did (or didn't do) once they identified the problem is going to come up in the case. If they haven't implemented something like what I described they're going to have a lot of 'splainin to do.