Data point of 1, but mine is as fast as anything. On my 7 year old desktop, upgraded from 7 to 10, its near instant. But given almost anything can hook into that menu (i.e. I have winrar, vscode, treesize, etc) it probably comes down to what you have running.
The second data point to the OP: I have a brand new laptop 16gb RAM and an SSD drive. When I mouse over "new", it takes 3-4 seconds for "folder" to appear. This is first thing in the morning with only Opera running. I do have a bunch of tabs open, but it does this without my browser running as well.
