30fps on a built in 32mb intel video card on laptop

from a thread i made on tremwars
Intel core duo 1.86ghz celeron laptop. Built in 32mb intel built in video card. 1gb ram running on vista.
Minimum FPS:
Rain map (with rain)
640x480: 52 1024x768: 20
Rain map (without rain)
640x480: 90 1024x768: 75
Transit (comparison)
640x480: 56 1024x768: 27
Jake has similar specs but a 9800GT and gets 90fps at all times on any resolution. So its really down to video card