Be patient, you'll find others I'm sure, I for one have not experienced any issue sms... maybe be more specific with a description, what is slow? The app load? Typing? Message transmission? Interval from sending (by others to you) till you receive it? Detail what you experience or problem is...
What is like this out of the box or did it happen when you started loading apps? Have you considered backing everything up and performing a "Factory data reset" loacted un Settings>Security?
Oh, and my stock sms work just fine.
install "sms quick delete". while in the app, select a thread, so u can see individual messages. press "select all" and then "delete". it will take a LONG time to delete them and will lag the phone until it is completely cleared. the app will continue to delete msgs in the background only when the phone is awake. you can see the progress in the stock messages app; the msg count will continue to diminish. do NOT allow your threads to exceed 500 messages or your phone will start to lag when sending messages within that thread. for some reason, android was coded to load ALL your messages within the thread thus making your phone lag.By backing everything up, does that include apps I've downloaded?
Also, I do have a very large thread and I think others are right, it bogs it down like no other. One thread I have is 4000+ but when I try to delete it, the phone gets hung up (no pun intended).
maybe if you change the thread title to "Stock sms is slow and freezes my phone" you would get a response from someone. I just poked my head into this thread cause im home having a beer with nothing to do.Why they hell is my stock sms so slooooww? It like freezes the phone up. Is no one else experiencing this? I want to use it but it's ********.