Ever since patch 1.5 Ive notice a delay at the start of every single multilayer game. I get a 3-15 second delay before I can start mining or building anything. About half the people I play with experience this same issue however the other half have no problems at all. When I play offline I get no delay whatever so ever.

My computer/internet connections are more than efficient enough to run SC2 with no problems.

I hope this helps