Believe it. Go to carpalx's key swaps page ( http://mkweb.bcgsc.ca/carpalx/?partial_optimization ). Make the first change on their list - swap K and E - and use the new layout until your brain gets used to the swap. Once you're comfortable, make the next swap.
Once you've made about 7 swaps you're on a layout that's on par with both Dvorak and Colemak, and you never had to waste a single hour in typing trainers.
Each swap takes me about five hours of typing over about 3 days to get used to. I imagine if your job has you typing all the time, your day-count will be lower. I have currently swapped E/K and O/J, and this post has reminded me to swap F/T as well.
There are plenty of keyboard remappers available for windows and osx, and it's not difficult to do yourself in linux either.