ya i have seen one guy's dv letter and there it was clearly mentioned that the selection in dv lottery doesn't gurantee that s/he will be granted visa and if you want to apply for visa go with these process or information on how to setup visa interview etc etc.......so....i didn't see that there was any misleading information regarding visa. i don't know if they send letter differently for diffferent people... but in the letter i saw it was clearly mentioned applicant might be rejected by consular....etc...