Other parts of the country have the same concept as supply and delivery even if they haven't deregulated. Even in states where the utility is also the marketer (which is still most states) there is an advertised "rate" that someone pays for electricity, which is what most people focus on. But then they are also charged a bunch of add on tariffs for the actual delivery of the electricity, as well as various other tariffs collected by the state for various things. The tariffs are either fixed rate or based on kWh, which means that even if someone gets a discounted rate like in a TOU/TOD (time of use/time of day) rate plan, this only lowers the rate portion of the bill, all of the tariffs remain as high as always since that is a separate part of the bill.
Also in a tiered situation people can get confused about what tier to use to calculate their charging, some figure I'll just use an average price. Or they just divide the total bill by total kWh. But if there are tiers then realistically all or most of the charging will be in the higher tier and that's the rate they should probably calculate on. Using me as an example, we have a tiered rate during summer, but before I got my Clarity I only barely got into the higher tier, meaning only a small fraction of my usage was at the higher rate. But that means any additional usage beyond what I normally use will be high tier. Meaning that realistically all of my charging is at the high tier price, so that's what I calculate on. I use a spreadsheet which is really the only way to get an accurate picture.
That being said, here in Georgia as in most parts of the country, even with all of the tariffs it is still cheaper to charge the car than to to use gas.