I'm not surprised, LTC is accepted almost everywhere, it's always easy to get liquidity, and the fees are low.
I actually talked to TalkImg about this DDoS, but it seems to be different attacker. The same group that attacked us over the weekend also attacked eXch back in March though.
I also found it surprising that the DDoS started just after the TalkImg ad...
Is the team you're talking about the one behind Infinity exchanger?