When I receive texts the time information on the text is the time my phone received it, not when the sender sent it! It can affect how I reply knowing how long ago the message was sent.
When I've been on other networks the time stamp showed when the text was sent, as I already know what time I received a message at, or are all phone companies now supplying less useful info to cover up how long a text takes to arrive.
I pretty sure I'm receiving them almost straight away, or as soon as turn phone on, just be nice to know how long ago text was sent. i.e. "Can you pick me up" and then you see text 2 hours old, don't just reply yes and take off.
I gone to view message details on phone, but it's same information.