Clem I believe your correct there is more delay with 6.1 but you have to remember every time they do a upgrade of the software from say 6.1 to something larger the bigger the program becomes the slower the system will be but not much of a delay, its inevitable with modification of any software. when windows 7 went to windows 10 I could see a difference! not much you can do about it just live with it, its a train just enjoy it!
Jeff remember you can always go back to previous versions if it works for you as long as there are not bugs in the software that you use!