Did Borders.com Results Lead To Barnes & Noble Chief Exit?

The timing of this one is just really odd..
Barnes & Noble Inc (BKS), the largest U.S. specialty bookseller, said on Tuesday
Barnes & Noble said Marie J. Toulantis's duties have been assumed by E-Commerce vice president Tom Burke and Kevin Frain, its chief financial officer. The bookseller said Toulantis will remain with the company as a consultant.
Now, this comes just a week after its rival, Borders (BGP) online results became public and BKS said it would not be able to finance a deal for Borders.
The graphs on the previous post show Borders online traffic and conversions surging since going live in June through July 26. One must assume this trend has continued and that Borders gains are coming at the expense of Barnes and Noble, not so much Amazon (AMZN).
Here is the chart:

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