This makes sense since Silver isn't supposed to available until Q3 right? "Available" meaning ready to produce or ready to deliver? If the former, then delivery in 3 to 5 months would put you in that timeframe.If you were to order a silver GT today, you're looking at December timeframe for delivery.
Yes, reservation date is a factor in when you are offered the opportunity to confirm but when you get put in the production queue is determined by confirmation date assuming you didn't order something that wasn't ready to be produced.Your confirmation date dictates your place in production, once you get your confirmation email, your reservation date is now obsolete.