Both my previous '94 gl1500 and my current '98 gl1500 perform adequately for me in the short time it takes to put my jacket and helmet on.
then it is back out of garage, get straight with the road, and take off with throttle and feather the clutch to keep her rolling.
I take off the "choke" at the first intersection which is a half mile. By then, the temp gauge is up a bit and she runs fine. I run it at about 2000-2500 rpm for that first half mile. After that, I just keep up with traffic.
I did the same trick as exavid just described once in the first two days of owning the first 1500, the '94 model.
I came out of the house with ATGATT, backed the bike out of the garage into the street still inline with the driveway.
Started it up, with almost no "choke" on at all. Blipped the throttle maybe twice and made a right turn, opened throttle and let the clutch out. Then it took a nap on my right ankle. But, I was able to get my left foot onto the backrest and push the bike up off my foot.
Very embarrassed, I got on the bike as if there were no pain in the foot at all. Ego made me start it up and get going. Road it to work for 30 minutes. By then, that cold weather was really making that ankle feel real good.