Have you, by any chance, attempted to communicate with a group? Have you, by any chance, had your messages delayed or - ostensibly - refused when attempting to do this? If you have attempted the former you will have experienced the latter. Unaccountable and inexcusable group chat delays.
Personally speaking, I have, and there is frankly no excuse for this, I am sorry. I fear that any attempt to tell me that a message of less than 4096 bytes cannot be distributed because, oh, groups or evil or something or other is going to meet with hollow laughter. I am a tolerant sort; please do not lie to my face.
The JIRA issue should one wish to vote regarding this seems to be at https://jira.secondlife.com/browse/VWR-513, not that voting does much except validate a pointless system, but one might as well - and please do, if you would, it costs nothing. In the near future I shall be investigating other possibilities of influence.