Does it taste like chicken?
Nope. It has a flavour of it's own. My personal opinion is that it is not too dissimilar to domestic pig in taste, only stronger/more flavorful, tougher and drier. Old boars, have a strong "warthog smell" which most people, including me, do not appreciate. But an old male wildebeest/impala/bushpig/domestic sheep/etc will also have a strong, often unappetizing, smell.
Some people describe warthog meat as "somewhere between pork and venison". The uncooked meat is a similar light colour to domestic pig which is similar to the colour of chicken, so there is an association with chicken, if you like
Interestingly, our other wild pig species - the bushpig - has more of a red meat than a white meat when compared to warthog.
Most people seem to prefer turning their warthog/bushpig into salamis, russians or other sausage. However, I love the meat in curry, stew, honey-mustard stir-fry and sticky barbecue ribs in addition to the processed products. My late dad even turned a few warthogs into biltong when I was young and although the biltong was lighter in colour to the kudu/impala/blesbok/etc is was delicious and, for those who may be concerned, nobody ever got sick or picked up tapeworm or any other parasites. I don't think the bugs and parasites could withstand the salt and vinegar used in the curing process.
Last year during our lunch break on a wingshooting excursion a friend brought along some European wild boar chops, marinated in herbs, salt, pepper and lemon juice and we grilled those on a hot plate. They were really outstanding. However those were farmed animals and very fat. I'm not sure what a European wild boar living off the veld would taste like.
I imagine your feral pigs over there must taste good too?
As always, diet, gender, shot placement, stress or lack of stress and handling of carcass play a big role in the quality, taste and texture of the meat.