It seems to me that the tech race in DYP is easier than unmodded civ at Regent & Monarch. You just choose a path and research deep. Because of the sheer numbers of techs and paths, there are plenty of trading opportunities.
At Emperor & Deity (unmodded), many of us have relied on minimum research gambits to buy our way into tech parity. When we move to DYP, the slider restrictions mean that this option is less effective, so if we fall way behind early in tech, it is more difficult to catch up. Plus, if several AI's get way ahead, they can more easliy keep a lead with more trading opportunities between them. The player never has a chance to pull off 2 for 1 trade deals or to slingshot, but the AI's are getting 2 for 1 deals by researching different techs and then trading. The key is to not fall behind early which means getting contact with as many civs as possible as early as possible so as to put yourself in a brokerage situation. Once a brokerage position is established, it can be maintained, but if it is never established, it is very difficult to catch up.
As for the easy levels (Chieftain & Warlord), I think finishing the tech tree is more difficult in DYP because the rest of the world falls behind and there is simply too much to self-research by 2050 or before you trigger another type of win (cultural especially). The key to finishing the tech tree on lower levels is to give away tech to other civs so they will hopefully do some of your research for you & you can trade for it instead of wasting turns researching it.
It would be interesting to see the Realms Beyond crowd try DYP to see how they would handle some of the challenges presented by the slider restrictions and if they could pull off some of their varients under the DYP mod.