I think i have created the first Lagggg Boat in Mt xD if u wanna see it just go on creative and warp Join_The_Pirates xD Laggggg on -Charger70
I don't really get any lag, seems fine. If anything, it's probably just all the mixes of transparent blocks (stained glass) straining your computer's ability to render them when you move.
I once lagged the whole creative server and almost kicked everyone off it. It was an accident, I fixed it all, apologised and got let off. Lets just say, never spawn in 1000 iron doors using worldedit, they break and... I wont even describe it. I was lucky I cleared the plot in time.