But "regular syrup" is just corn syrup with added flavors and colorings? At least, here in the USA it is. I've not sure I've seen any pancake syrup that's made with cane sugar. Besides real maple syrup, of course, but I'm not sure I've seen any thickened maple strup products either?
But things which are labeled "pure maple syrup" have some pretty solid USDA standards; its a pretty regulated terminology. Even the generic/house brands are real maple syrup.
Similarly you gotta watch out for real honey versus fake honey flavored corn syrup. Most bottles you'll find in the store will be real honey but little packets will often be "honey sauce".
You can buy pure maple syrup, but it costs more and you have to read the labels. The big brands, and most restaurants are serving you corn syrup though.