No idea, I've read people recommending it but I always use my Black Knight Sword (I DON'T CARE IF IT NEEDS TWINKLING TITANITE ).Drake sword is kinda a noob trap? I mean it's a good early sword, I guess, but you better stick to other weapons (something like Zweihander or Great Scythe) since there are better weapons which doesn't need Twinkling Titanite to upgrade.
I also followed the guide I mentioned and got Quelaag's Furysword (which was my main except against Demons).