I'm not sure what winamp5.0 you are using, but to even dare say its that bad is just rediculous.
Winamp 5.0 open - idle - 1068K -
PROOF
Winamp 5.0 w/media lib open - idle - 1452K -
PROOF
Winamp5.o PLAYING - 2428K -
PROOF
Now lets see Real do anything near this, and this isnt even going near how Real steals file extensions w/out permission.
If for some reason you want stats, here you go:
AMD 2500+ Barton @ 2.01Ghz
2x512MB Corsaid XMS LL Pc3200
Abit NF7-S (So yes I am using onboard 5.1 Dolby Digital Surround Sound when that was playing.)
XP Pro
Thats about all that should matter in this case...