Vorbis - Jun 2006 - Reading in 0 with ov_read doesn't seem to be wrong

After reading in 160k of NULL ov_read starts to read good data.  This even 
happens when I decode the entire file the first 160k is NULL without using 
streaming code.  Now my question is would having NULL in the first 5+ 
buffers of streaming have any effect when it doesn't even cause a slight 
pause with non-streaming.