If you can't because Bitcoin-qt is not synchronized, you can import addresses to Electrum and then send coind from imported addresses to one of your Electrum address
If he imports the addresses to Electrum there is no need to send Coins from Electrum to Electrum.
Well It will create me so work, beacuse of all the multiple backups and encryptions etc.
If you just send the Coins from your old QT-wallet to the new Electrum-wallet, you don't need to care about your old backups anymore, seems like less work.
And it is definetely less work to just send them than to export/import each and every address from one wallet to the other.
If you don't really need the addresses, it's easier to just send Coins.
If you really need the addresses (or some of them), you can still export/import them later (if you keep at least one backup).