ON 20070606@1:21:38 PM at page:
http://www.piclist.com/techref/member/NG--944/about.htm#39239.5566898148
Dwayne  Reid[DR-TES-P97] Says

Minor correction regarding James' description of $+1.  $+1 is a NOP that takes 2 instruction cycles.  A NOP takes 1 instruction cycle.  <BR>
<BR>
The purpose is to generate a precise 2 cycle delay but using only a single code space.  In other words, shorter / more compact code.