Originally Posted by
NWIFlyer
I would tend to agree - I think what will happen is that you'll qualify for Silver, your year will reset, and then you'll have a further 12 months to get the miles for Gold.
I tend to disagree as the text states "24,000 miles within 12 months (including at least 4 Aegean or Olympic Air flights) or a total of 48,000 miles, regardless of which airline you choose to fly with". It does not mention that one has to be silver as a prerequisite.