Can't really call it an exodus (not yet anyway), but the rate at which top-level executives and channel-facing managers have been departing Cisco in recent months is definitely noticeable. First came Tony Bates, Cisco's former senior vice president, enterprise, commercial and small business group, who bolted Cisco to take over as CEO of Skype. Then, earlier this year, Susan Bostrom, Cisco's executive vice president and chief marketing officer, announced she would step down. And in the channel executive team, the loss of channel marketing guru Luanne Tierney, who jumped ship for a similar role at Juniper, is being keenly felt among Cisco's channel brass and its partners. Just this week came another: collaboration chief Debra Chrapaty, who exited for games maker Zynga.