For example if you look at it another way... (excluding Bangers and other crap teams)
Australia 10 W 4 L 0 T 1 NR
W/L 2.5
England 6 W 6 L 1 T 2 NR
W/L 1.0
India 11 W 8 L 0 T 2 NR
W/L 1.37
New Zealand 6 W 2 L 1 T 1 NR
W/L 3.0
Pakistan 2 W 3 L 0 T 0 NR
W/L .66
South Africa 5 W 4 L 0 T 1 NR
W/L 1.25
Sri Lanka 6 W 11 L 0 T 2 NR
W/L .54
West Indies 2 W 10 L 0 T 1 NR
W/L .2
Now those figures (besides NZ benefiting from not playing all that many matches yet still firmly top 3 material) would give us the impression of something like.
Aus
Ind-NZ
SA
Eng
Pak
SRL
WI
Add a form guide...
Aus NR W L W W W W L L L W W W W W
Eng L L W T L W NR L L L W W W W NR
Ind NR NR W L L W L W W W W L W L W L L W W NR W L
NZ W W L T W L NR W W W
Pak L W L L W
SAF W W W W W L L L L NR
SRL NR L W L L L L W L L NR W L W W L L NR L W
WI L L L L L L W W NR L L L L L
Australia on the up, England on the up, India solid, NZ on the up, Pak solid, Saf down, Srl down, WI crashing burning.
Now in a quick spread of the teams average runs per wicket (X10 for each wicket remember this does not take into account matches of shorter length) and on their RPO (score against them we'll see another aspect in the value of their wins and what not.
Aus 307 - 249 = 58
Eng 311 - 258 = 53
Ind 305 - 258 = 47
NZ 338 - 264 = 74
Pak 483 - 292 = 191
SAF 310 - 259 = 51
SRL 266 - 232 = 34
WI 258 - 240 = 14
While Pak skew these figures massively due to only playing 5 games. This list shows how emphatic the teams victories have been. NZ (though more games should change this too having only played England) come out on top and then.
Aus, Eng, Saf, Ind Srl, WI
Margin of victory is important in considering the best teams yet without a full years cricket under our belt it still unreliable at best.
A top 5 have become clear though, Australia, England, India, New Zealand and South Africa. We'll have to wait for NZ and the Pollockless SA to play more cricket to be able to give real shape to any rankings though.