fix to README

README.md

@@ -2,7 +2,8 @@
 
 ZMap is a fast network scanner designed for Internet-wide network surveys. On a
 typical desktop computer with a gigabit Ethernet connection, ZMap is capable
-scanning the entire public IPv4 address space in under five minutes.
+scanning the entire public IPv4 address space in under 45 minutes. With a 10gigE
+connection and PF_RING, ZMap can scan the IPv4 address space in under 5 minutes.
 
 While previous network tools have been designed to scan small network segments,
 ZMap is specifically architected to scan the entire address space.  It is built