Have had the hybrid v5 and .141 on the phone since it was announced and os shrink and all that good stuff.
i send and recieve about 500+ texts a day and the storm has been great. As of yesterday when sending a text it literaly takes from send to back to main message folder 15 seconds. i have NO CLUE why and its making me want to throw my phone.
Have you tried a battery pull? Also with 500 text a day, if your not deleting any of them, you could be overfilling your inbox. Don't forget that it's also a telephone. You might consider calling some of those people.