My experience has been pretty much the complete opposite of this.
Here is Tyll from Inner Fidelity's take on these headphones in case it wasn't posted earlier...in short, he likes 'em....a lot.
EDIT: Wow, I finally got around to hooking them up to my Meier amp...these things actually scale a bit with better amplification. I truly could be very happy with these as my one and only headphone if my situation dictated that...with better amplification the separation improves a fair bit as well as the imaging. I'd even say the sound stage is a bit larger, too...clearly an improvement over my iPhone, even though I was quite happy with how they sounded directly from there, as well.
Yes Tyll likes them and I saw the review months ago when it first came out. As for amplification I've had it amped through an ALO RX MKII and a Leckerton UHA-4. I've also been at a friends place and we've amped it with a Bottlehead Crack and his iBasso mobile amp and at all times there was a bit of improvement but not good enough to say the DT1350 sounds good with electronica and rap. If you like how the DT1350 sounds with rap and electronica more power to you but most people won't. There's not enough body and slam behind the bass for most people to like it.