Flex applications I've seen so far take quite some time to load even when using high-speed internet, are there any ways to improve loading time?
And has Adobe any plan to improve this?
SCJA 1.0, SCJP 1.4, SCWCD 1.4, SCBCD 1.3, SCJP 5.0, SCEA 5, SCBCD 5; OCUP - Fundamental, Intermediate and Advanced; IBM Certified Solution Designer - OOAD, vUML 2; SpringSource Certified Spring Professional
Your question isn't specific to any issue. For that matter any badly written application would take time to load even if it is developed in traditional technologies such as JSP, PHP, ASP etc.
Flex applications run on a client side so first time you visit the url, it will take time (depends on application size) to load it and it will be cached for further use, so the next time you visit it will be loaded in no time.