I am really surprised with some newbie here who has placed order for ~350+ directories and after the work is done, the person is claiming that his search engine will not improve because I have submitted it to directories which have low PR and high Alexa rank. He is trying to teach me that search engine gives value to article directories which have low alexa... even if these guys think like these, here is the figure:
61 article directories have alexa rank of less than 100000
243 article directories have alexa rank of less than 500000
46 article directories have PR 3-5
104 article directories have PR 2-5
196 article directories have PR 1-5
These guys even do not understand the article directories URL structure and try to argue with me.
These guys expect me to submit to Top 300 article directories for $10...

They should know it cost $149 if they want to avail that
To all those guys: If you have any concern, dont place the order. clarify the point and then place the order and please do not waste my time asking unnecessary questions.
(Note: Though I have not faced this issue ever, but recently I got one client who did like this and thought to post it here)