The fact that I've never even seen a spread limit game suggests that there might be differences between east coast poker and minnesota poker.
In some states, only limit is allowed by law. It's not just E coast!
True, and this is the case in Minnesota, we we have a 100 wager limit in poker by regulation, about 10 years ago, the limit was only 60.
All games were fixed limit, but they did introduce spread limit when they got the increase to 100.
As far as the $2/4 game goes - I've only ever played it in one location and they used $2's. If they ever reopen poker at the Encore, I'll take a peek and see what they're using.
I have counted at least 6 rooms in my head where I have played that have had 2/4 and they all used singles. There are a few more where the low game was 4/8 and they also used singles.
Your room uses 1's, 2's but no 5's in 2-100 spread? Do they use 25's?
Could you tell me about how switching has effected bet and pot sizes?
25s don't get a lot of use in many poker games except for the rare 50/100 limit game, or as the color up chip in blue chip ($1 chip) games.
Some players (myself included) will request only a small quantity of yellow ($2s) and the rest in red ($5s) when buying into the spread game, but otherwise they bring all yellow by default.
I don't play this game a lot because it's slow and the chip situation makes it worse. You have to move half a rack into the pot to bet max. Also the aforementioned 8/16 limit game is much faster, better action, and plays bigger.
Not having played a lot of 1-2 NL, in other states obviously, it would be hard for me to compare bet sizes. Most pre openings are for 6-8, and I think most players still bet half pot or pot on early streets. The 100 limit does change the equation later in hands in huge pots, however.