I have a clean new Raspbian Jessie installed via NOOBS today. No special things done.
When I start it from the SD card it hangs right after the funny colored image with the following screen:
udhcp (v1.23.1) started Sending discover... Sending discover... Sending discover... No lease, failing Starting system message bus: done
It won't continue booting until I hit ESC on keyboard. Then it continues booting with its well known long boot logs with the green [OK]'s scrolling up and ending on the GUI.
$pi@raspberrypi:~ $ uname -a $pi@raspberrypi:~ $ Linux raspberrypi 4.1.19+ #858 Tue Mar 15 15:52:03 2016 armv6l GNU/Linux
- /var/log/syslog (pressed ESC key at 09:13:20)