Is the experience from the subscriber perspective the same regardless of bearer?
Yes, unless the user receives an SI and initiates a pull to download large content, in which case the user would experience a long delay before the content is delivered completely when sending over SMS. The user would not see a delay if the entire message is pushed, since they would know that they have a message until the entire message has arrived. WAP Push uses the user data header to indicate that the SMS message is a WAP Push message. The WAP default is used if the handset does not negotiate. WTP SAR will allow 256×1400 bytes, and Extended WTP SAR will allow even larger content as part of WAP 2.0.