Well, I'm going to bet that the answer is "no" as I get an FPS of <15 on the menu and any pause screens.
I've tried several locations on the same pocket. Let me gen up some others.
Pocket world Seed 1:
--no forrest areas (weird, but ok)
--Found an area with mountains in the local, 2x2 had cliffs of 4-5, but was all "hilly" terrain of apparently similar hight (the hightmap was all the same color there)
--FPS: 14 on embark
Medium world Seed 1:
--Site spam? 9 Dwarven holds all bordering (or across the river from) each other, only place I saw it, did not check whole world. This would be the second world-gen in a session.
--Embarked on a 3x3 instead of my ussual 2x2 to see if rivers/bodies of water still did funny things. This one did not.
--11 z-levels (from bottom of a lake to an extreme mountain top (those grey solid triangles)
--FPS: 14 on embark
Standard world Seed 1:
--...60 rejects later...
--...unloading 15809 units later...
--Don't ever start a game where two "extra deep" rivers (the ones with two lines) cross and the only map tiles are river. Weird shit happens (notably one river that falls 24 levels to a 2 level deep "lake" (it's called river) and the area where the river falls isn't revealed, i.e. openspace right next to black). Looks like the two combined rivers excavated the entire middle of the map down to bedrock. Exporting this crazyness to DFMA. Link
--FPS on embark: 14