Slow Directory Submission or Delayed Directory Submit Service
The main question which is quite confusion in directory submission industry is to go for slow or delayed submission or normal fast directory submit services
In conclusion you should advice the directory submission company not to submit more than 50 submissions a day if you have got a package of 1000 directory submission. In my opinion you must get your site submitted in directories with a period of one month. It may cost but the results will be quite effective. The concept is well known as slow and delayed directory submission services.