In smb.conf there is still a pointer to out-dated Speed.txt:
For more information see the file
<filename moreinfo="none">Speed.txt</filename> in the Samba
<filename moreinfo="none">docs/</filename> directory.
Looks like this got fixed some time prior to 3.0.25.
Speed.txt is revived at Samba 3.2.4 :-(
Fixed with commit 52aa522a in master.
Patch will be included in Samba 3.4.4.
Closing out bug report.
Thanks for reporting!