I can confirm this! (Windows 7, Pd 0.48).
I also noticed the following: [midiin] won't output realtime messages while it does output sysex messages.
actually it would be cool if [midiin] would really output all MIDI messages!
[midiclkin] doesn't output any clock messages while [midirealtimein] does so it's apparently broken.
[midirealtimein] outputs all realtime messages except active sensing.