It's becoming frustrating, and it's really unnecessary to discuss a private conversation under a public topic.
DdmrDdmr pretty much said what you needed to know about the topic. the wait time was implemented to reduce the number of trolls, spammers, scammers, etc.. from posting or sending PMs to other members. if you want to bypass or remove the restriction you can buy a copper membership or increase your account's activity or rank.
I suggest reading this thread
Newbies - Read before posting.