Transactions before and after worked well, just wanted to mention that transactions can still fail, despite the notification "Transaction sent".
Also, I didn't know that the TX is being sent client-wise.

Btw, is there a way to send the signed transaction using bitcoin-qt? I've tried sendrawtransaction with the signed raw transaction, but I get 'TX rejected (code -22)'.
Would it speed up confirming the TX, since blockchain.info shows a queue position? Or do they broadcast the transaction straight away?