I have calculated thw swing in the first sixteen constituencies whose Presidential vote has been confirmed by the Electoral Commission. This swing is as compared to the first round in 2008, which Nana Addo narrowly won. The swing is here calculated between NPP and NDC, ignoring other parties.

KEEA 0.8% swing to NPP
Ningo Prampram 3.7% swing to NPP
Efutu Central 2.6% swing to NPP
Asowase 0.7% swing to NDC
Anlo 0.7% swing to NPP
Afigya Sekyere West 2.6% swing to NDC
Nkawkaw 0.9% swing to NDC
Krachi East 0.8% swing to NDC
Cape Coast North 0.4% swing to NPP
Gomoa East 1.9% swing to NPP
N Juaben South 0.2% swing to NDC
Sekondi 4.5% swing to NDC
Abuakwa North 0.2% swing to NDC
Mampong 2.1% swing to NDC
La Dade Kotopon 0.8% swing to NDC
Lambussie 14.5% swing to NDC

Aggregarting all the votes, there is a swing of 0.4% from NPP to NDC compared to the first round in 2008. But that still leaves Nana Addo in the lead, just. As usual, a Ghanaian election is way too close to call early.