The answer is Yes and NO.
Yes. First I'm okay if NEP and Turkana can cheat a little bit census wise. It only fair given what they've been thro. Now when it come to non-marginalized areas; what was very surprising during the last demarcation was how central who were crying gerrymandering were mostly favored;I'm not sure for how many years protected const will enjoy; but until 2019; we will go to next election with same constitutuencies.
Ethnically those disadvantaged are tribes who have dispersed mostly into urban areas. Kikuyu,Luo and Luhyas are most affected. The Luos in Nakuru or Naivasha or in Mombasa or in Kiambu or in Kericho will not be getting any representation anytime soon. The same kind be said of Kikuyus in Kisumu or etc.
Kalenjin enjoy the advantage because they've not urbanize...they are disadvantaged in few areas of Nakuru or Kitale and etc. So Kalenjin have nearly 60 mps just as many as Kikuyus have.
Was there gerrymandering. Yes. And alot of it. the numbers may look okay but where the boundary is drawn matters.
For example Eldoret town was sliced into six...all ending in town...with sole intention of disenfranchising non-natives.
Nandi split tinderet..in a way to disenfranchise kipsigis and luhyas.
Maasai split Narok south...in a way to disfranchise kipsigis...
Those are the few i'm aware of....I know there are many more like those all over the country.
In short until we have use like SQUARES AND RECTANGLES...straight lines....our boundaries with all funny corners are meant to GERRYMANDER.
Kenya borders are drawn largely along tribal, sub tribal and clan lines.
US borders are largely straight and some in perfect squares because they made effort to foster unity. But they didn't have to deal with 42 tribes..and 1000 clans.
Pundit is better placed.
Representation is based on population and geography. It boils down to the census and how accurate it really is. There are complaints against it. For example why does it consistently show Luos as a small tribe but the election results tell a different story?
The winner the last time round were the RVs. They got more constituencies than anybody else.
We may experience the first real gerrymandering when there is another demarcation of boundaries. That is because some constituencies would vanish and new one created - exactly as it is supposed to be. Had that not happened, the loser would have been Central Province. There were very many constituencies there that fell short of the minimum number of persons requisite to create a constituency.