Thanks, 

I guess here is my question put better: 

If i make a line and a vline object, and feed them both a [1, 0 50(  message, they perform differently.  The line object jumps around, presumably cos it is tied to block boundaries.  
But the vline always triggers exactly the same.  

It's as if somehow the vline~ works outside of the block structure.  Does it actually do that?  Say you're at sample 47 of a 64 sample block, does vline jump the queue and trigger right then?  

Or i guess, even more succinctly, i was assuming that everything in pd got triggered in blocks.  Is that the case?  Does vline also have to wait for a block boundary when first triggered? 
  
Sorry, there's obviously some 'aha' moment i'm failing to have here.