Data point. Opened and still have citi plat visa on Dec 2010.
Just did two browser trick on different browsers using first links on OP for visa and Amex. Instant approval on visa and "app received" on Amex.
Thanks to all for all the great info, hope this post helps the community by passing on that I was able to get another plat visa after 16 months. Still hope to get the Amex as well.
Felicity