So I tested this and on her u740 she sent me a message and i received it like 10 secs later and it showed delivered at that time. I waited about an hour and opened the message(even though I could read it when it came through) and closed out of my texts which got rid of the notification and it added delivered 10 mins later.
I'm pretty sure this is only a verizon thing and almost every verizon non windows phone is capable of this feature. Also verizon only charges for text messages that are read from the handset if you don't have unlimited texts which is prob why they have this feature.
Maybe it's not a feature available on our phones but It is possible to have.
Ok well I thought we were talking about straight SMS with no EMS application extension (which is the feature you're referring to).
I'll explain a little about the SMS system.
You get the D notification when it is a subscriber within your network (i.e. Verizon to Verizon as you've been testing), it has to do with a specific signature flag that is triggered from within that network and does not cross networks.
The check mark means the cell tower has received and cached the message on the tower server for queuing to be transmitted. Once the SMS message has left queuing and goes to transit, which means it has left the tower's local server and has been sent to the carrier message manager (or out to a different network), then the D appears saying the message has been delivered. This really means "message has been delivered to the network" not necessarily to the recipient's device. Most of the time it happens so fast it usually hits the person's handset roughly within 3-5 seconds which coincidentally is the same time the queue server will send you the D flag to notify you it's been delivered. It's a pretty accurate indicator, but is completely unrelated. This D does not indicate when the message was read. In some instances, the person's handset can be off and you'll still get the D.
The times and updated times you're seeing on the u740 is part of the Enhanced Messaging Service, or EMS, application extension to SMS. The u740 is an EMS capable device, which is why you're seeing these updates. Windows Mobile devices are NOT EMS capable, which is why you'll never see this feature, nor will you see any workaround or fix. The only way you'll be able to get this feature is if you ditch your Titan for an EMS capable non smart phone, or if in the future they decide to make WM EMS capable.
Hopefully this clears up the confusion a little.