It is optimistic, but then again this region has the money and the will to do it. We have to wait and see when the contract is done and the initial speed of construction to determine whether it is possible.^^ A tad optimistic time frame isn't it? Dubai Metro took almost 5 years to complete (Red Line) so i doubt that the GCC-wide railway network will be done in 7 years.
Are you for real? The metro is actually doing quite well and i can guarantee that you're not gonna get a seat during rush hour. I'm speaking from personal experience so don't ask me for more proof than that!^^
The red line is not complete. Mostly empty trains running making less than half the required stops!