In reply to PPP:
Where I work we stock everything from air rifles to buoyancy aids and a whole load of camping and hiking stuff in between, there's a lot of stuff and you can't expect someone being paid minimum wage to spend their evenings reading up on the technical intricacies of all the products they stock plus all the products they don't stock to help you compare. It's not realistic for me to be able to give one customer detailed info about the different components of half a dozen rifles and then go on to give another customer detailed information about the different manufacturing processes of 10 different brands of footwear. The tech that goes into footwear is ridiculous. The reps don't visit as much as they used to as the companies can't afford it, the tech is constantly changing and every season you get a whole load of new stock in and it's down to individual shops to go through product info for dozens of items. Training from companies, while usually good, is irregular and some don't even bother at all. Add on to that that sales assistants who do a lot of outdoor pursuits tend to come and go quite quickly, the pay is less than you would get from cleaning the streets and they'll often be treated like shit by customers day in day out, so a lot of people who would be good at the job don't hang around very long so don't have the time to build up knowledge.
Take walking poles for example, there's very few shops that stock 3 or 4 decent brands of walking poles and it's very unlikely that you'll find one with a sales assistant who knows the technical specs of them all and has also tested them all. The internet can give you all that instantly. Sales assistants can help you if you don't know anything about something but if you're already a gear nut and you go into a shop having freshly read a lot of reviews and product info online then do you really expect them to be able to match that?
The guy you describe doesn't sound particularly good but remember you were expecting him to know detailed info about two pretty complex and disparate bits of kit. Of course in an ideal world he would have said "I'm not actually sure on that but I'll find out". In the real world, in a busy shop it's unlikely you'll have someone go off and phone suunto for you to get the product info when, after spending time trying to get through to the company the customer is probably going to "go and think about it" anyway (i.e. buy it online).