Long line at the runway... is this common?

Hello,
I found this site from google and it seems pretty good.
I am new to Flight Simulator and flying in general, so this may seem like a stupid question to a lot of you.
I apoligize if this has been asked before.
I filed an IFR Flight Plan from Seattle Tacoma to Portland, and I set Traffic to 100% (I need something to keep me company in the sky).
Seattle Ground told me to taxi and hold short of Runway 32R (or was it 34?). When I got there, ATC told me to hold short of the runway. Pretty soon, there were about eight airplanes lined up short of the runway, none of them cleared to take off, and one of them disappearing every now and then. There was one airplane after another landing, and I sat there for about 45 minutes and I never got a takeoff clearance.
Is this common in real life at busy airports? Will I ever get a clearance? Do you sometimes have to wait an hour before you are cleared to take off? I don't mind waiting; I just need to know if I'm wasting time or not.
Thanks.
I found this site from google and it seems pretty good.
I am new to Flight Simulator and flying in general, so this may seem like a stupid question to a lot of you.
I apoligize if this has been asked before.
I filed an IFR Flight Plan from Seattle Tacoma to Portland, and I set Traffic to 100% (I need something to keep me company in the sky).
Seattle Ground told me to taxi and hold short of Runway 32R (or was it 34?). When I got there, ATC told me to hold short of the runway. Pretty soon, there were about eight airplanes lined up short of the runway, none of them cleared to take off, and one of them disappearing every now and then. There was one airplane after another landing, and I sat there for about 45 minutes and I never got a takeoff clearance.
Is this common in real life at busy airports? Will I ever get a clearance? Do you sometimes have to wait an hour before you are cleared to take off? I don't mind waiting; I just need to know if I'm wasting time or not.
Thanks.