IMs Take Over SMS/MMS?

To the developers of GoTalkMobile:

“Recent research by Orange has indicated that texting could soon become a thing of the past. Research by TNS of 17,000 people in 30 countries revealed that once users adopt mobile instant messaging services such as AIM and MSN Messenger on their mobile phones, they reduce their use of text messages.” Source:  www.utalkmarketing.com

Although I am personally concerned about battery life when using IMs, once you are into them, it is hard to return back home to the ole good SMS…