Correct: With version 8 weather data went up dramatically as we're downloading nexrad for the country, including a 30 minute animation. But it should still be <2 minutes. And this has been reduced to <1 minute with the upcoming version 9.
If you are seeing more than ~2 mins to download weather your SD card might be suffering from file fragmentation. Unlike your typical hard drive, you cannot really defrag an SD card. The best way to speed it back up is to make a full backup, format the card, then restore your data. If you are not comfortable doing this we have a $10 update-by-mail program where we will do this for you, and fill your card with all the latest data.
-Walter