Interesting to see how easily one thing gets stereotyped... Flash, when designed from a technical standpoint will not load slowly if the designer knows what they are doing. All the bells and whistles are a designers POV. What if I were to say... "I dont use photography at all because all pictures are grainy and underexposed" Which can be a true statement if you are looking at most beginners with a DSLR or a lot of the P&S cameras. Sure that may be an exaggeration, however to say that all flash is "bad" is misinformation. All because some are bad, doesnt mean the medium is bad in general. Are you sure its a flash site and not just straight javascript failing to load?
I am a big fan on CMS sites mainly due to the fact that they can be updated anyplace with web access. No programs needed like Flash. They utilize flash elements as well and can make a nice fast loading site.