Most people don't realize there is a difference between these two types of leads.  I would imagine that most people think the terms are synonomous.  Here's the truth:

Phone Verified Leads - Leads that are generated through an autodialer.  The computerized autodialer calls through older and cheaper leads.  When the person answers the phone, a touch-tone phone interview is conducted where the person punches certain numbers on their phone to answer a few questions.  Autodialer interviews typically last about 1 minute.

Telephone Interviewed Leads - Leads that are called by a real person in a telemarketing call center.  They are interviewed, qualified, and sorted by a real person.  Live telephone interviews can last 5 - 10 minutes.

I would suspect that 95% of all websites that sell telephone interviewed leads are actually selling phone verified leads.  It is quite likely the leads company selling the site doesn't know they are selling verified leads because they are only a reseller anyway.

If you are buying verified leads, that is fine.  It is a good lead.  But, if you are thinking you are actually buying an interviewed lead, then you're being deceived.  Here are a few things you can use to tell the difference:

1. If you order 50 interviewed leads, and they all get delivered in about 2 hours, then they are verified leads.  Real interviewed leads could not be generated that quickly.
2. If you are paying less than $5.00/lead for a real time interviewed lead, then it is a verified lead.  A geniune interviewed lead could not be sold for less.  We see telephone interviewed leads being sold for $2 - $3/lead.  We've tested them. They are verified, not interviewed.
3. A prospect who has been interviewed by a real person will remember being interviewed.  They will probably remember the name of the person who interviewed them.  A verified lead may not remember because someone else in the house may have taken the computerized touch tone survey.
4. A real telephone interviewed lead will have a higher conversion rate…. maybe one or two out of 10 leads.  A verified lead will probably have a conversion rate of one out of 35 or 50 leads.

I hope this helps.  If you're buying verified leads, that's fine, if that is what you intend to buy.  If you want interviewed leads, expect to pay more, but expect a much higher quality lead.