Yesterday I needed to swap few BSC tokens. Since my wallet had no BNB, I've withdrawn few from gambling casino. It took about 30 minutes before I got them in my wallet. Confirmation and swapping took also about an hour. When everything was done, I have withdrawn BNB to Binance and they were confirmed there in about 5min and I've paid for that transaction 6 cents.

If we open etherscan.io right now, we could see that a transaction can be done with the following circumstances "15 gwei $0.79 | ~ 16 mins:0 secs". This is still slower and expensive than a BSC transaction, but it does not look like a "3 sec" quick and "50 times cheaper".