With the message sent you've been compromised with Slade's nanomachines; come to <XX,YY,ZZ> to talk there remained little to do but wait for the Titans to arrive. Dick had maintained typical subterfuge upon entering Robin's universe, despite the teen's assertion that Slade would know immediately. Whether not he would know was irrelevant. What was worrying him was whether or not he should have simply PINpointed right into the Titans Tower and sat there waiting. He didn't think they would take too kindly to that, but it would have cut through a lot of dithering and waiting around.