I can attest that the lower memory usage is real and is noticeable. In my journeyman game (that would have a pic in my sig if it worked with non-standard leagues, as I'm in swedish division 1 sodraettan, third level) I'm playing with all the way France, Spain, England, Germany, Holland, Portugal, Italy, Greece, Turkey, Poland, Sweden, Brazil and Argentina with a custom DB adding all international capped and main figures from every continent.
Before the patch it was irresponsive to buttong clicking sometimes and closing was a lot of time with over 1GB of RAM used, checking the job center took like 40 seconds to show. I've not checked the RAM used, but is sensibly lower, buttons are responsive, closing is acceptably fast and seeing the job center doesn't take more than five seconds.
FM programmers really keep surprising me nicely. I would contribute to give them wage raises if I had the money to.