With the success of the virtual personal assistant, Siri, on the iPhone 4S, it comes as a surprise the popular feature isn't included on Apple's latest iPad. So why didn't Siri make the cut?

Siri needs an active network connection to work properly and the majority of Siri's software isn't stored locally but on Apple's servers, according to DailyFinance.com, and while a smartphone will have a constant connection, the new iPad may not.

The site also claims Siri's reliability has been plummeting. Steve Wozniak, who co-founded Apple with Steve Jobs in 1976, admits Siri hasn't worked that well since it was built into the iPhone 4S.

In a January interview with The Daily Beast, Wozniak said I used to ask Siri, 'What are the five biggest lakes in California?' and it would come back with the answer. Now it just misses. It gives me real estate listings. I used to ask, 'What are the prime numbers greater than 87?' and it would answer. Now instead of getting prime numbers, I get listings for prime rib, or prime real estate.

Wozniak also discussed the necessity of a reliable connection to the servers. He said while the iPhone 4S should always have a data connection, Siri sometimes can't connect over the Internet.

So if a reliable Siri can't be guaranteed on a product with a definite data connection like the iPhone 4S, how could it be included on the latest iPad, which doesn't come with a constant connection?

While Siri has been making headlines for its exclusion from the new iPad, a New York man is also suing Apple over misleading ads promoting the virtual personal assistant's capabilities. According to PCMag, Frank Fazio filed a class-action suit on March 6 in San Jose, Calif., claiming that Siri doesn't come close to performing the functions as well or as consistently as Apple advertises it doing. Fazio's suit also claims can dramatically increase monthly data usage of iPhone 4S users and push them over their monthly data plans.