I would go along with synchromesh but this game and father's island will run on low end computers.
synchromesh has not said but I would guess his tests was at 1080p. like most Steam users
If GameGuru would let you change the screen res from the menus then the FPS would jump up.
Most customers don't want to change the desktop res before starting a game and most don't know that GameGuru uses the desktop res for the game res
To make my point see test below
CPU Intel G2020 @2.9Ghz
GPU ATI HD 4730 (512mb VRam)
6Gb Ram DDR 3
Tested at 720p
On level 1... I get 15 to 25 fps
On level 2... I get 25 to 45 fps
GameGuru is a hard engine to understand heres another test
A10 7700k Quad-Core Vs A6-3670K 2.7GHz Quad-Core both using their onboard graphics.
Both tested on a game map of mine the A10 7700k is only 4 or 5 FPS Faster. which is about 10% Faster
But test them on a game like Call of Duty and the A10 7700k is 100% faster.
So changing the screen res on the fly like AAA Games would be a great help to some Steam/GameGuru user.
I hope some day this will be added by Lee.