According to Adam Wilt from MacInTouch .
So, it’s confirmed: under 10.9 you can no longer sync Contacts & Calendars over USB:
„If you use OS X Mavericks v.10.9 or later, your contacts, calendars, and other info are updated on your computers and iOS devices via iCloud. “
I’ve tested this myself using 10.9 and an iPhone 4 running 7.0.2.
How do folks feel about the privacy & security implications of this?
See also this german article for details on this issue.
For me this is a security issue and security savy people should send input to apple so they can react. Goto Apple feedback page and tell them to put back in syncservices. Do it now.