CA onramps were built to allow a vehicle to come up to freeway speeds. I don't know a single person that is in the right lane that doesn't scan the oncoming onramp to see if they need to move over, speed up/slow down to allow that person in. If you are whistling dixie instead of paying attention to merging traffic in CA, you'd probably get the not so nice hand wave in addition to the long lay your hand on the horn, honk.
Regarding our metered ramps. I'm in favor of them during rush hour. It allows for a better zipper type of situation to keep the freeway moving even though it may back up the oncoming ramp a little. But to be fair, in rush hour you're either sitting in traffic on the freeway or the ramp anyway. This way there isn't 50 cars trying to zip all at once.
The zipper situation when a lane ends or construction. When the sign a half mile back tells you to merge due to lane closures, those that follow the rules tend to do so. So, when they are waiting in that line and watching others who don't merge right away and they get ahead of them, they get irritated. If they want you to zipper up ahead, why have the signs a mile back telling you to merge to the left? And yes, they have the signs telling you to move over about a mile back. You are taking your chances here as a lot of people will not let you in if they've been waiting a long time. There is one area on I5 near downtown (from the airport, right around 880 overpass) where it goes from 4 lanes to 3. It tells you this miles back. During rush hour in the morning, there would be a long line in the 3 lane. You would occassionally see someone buzz by in that 4 lane trying to overtake the people in the 3 lane. Rush hour people are NOT nice in the morning. They will be bumper to bumper, they will stradle the 3/4 lane not allowing a car to move forward in the 4 lane. Sounds rude but 90% of those on the freeway at that time from the people in the 3 and 4 lanes are/were state workers and we all had to get to work. You weren't special to get ahead of anyone.