250Kts posted
"And even when you know where the traffic is on TCAS you STILL ask for further descent. eg "AAA123 approaching FL310 requesting lower"
This came up here on the ATC section of the prune a number of months ago. I as a pilot would wait till obvious TCAS conflictions were gone until making a request. I was told by a controllers not to wait, as the sooner they know about my request, the sooner they can plan and act upon it. Just know your rant isn't shared by all your controller brethern.