[ralfd]

This is a good question. The resource panel from the old Safari 4 webinspector looked that way:

http://www.webkit.org/blog/197/web-inspector-redesign/

[jason_slack]

Yup, Safari 5 I dont see this.

[nerdtalker]

The closest thing is now the bottom row under Network, which shows total requests and network transfer for the current page load.