what he ^^^ said. they're never waterproof as claimed. they can resist water but the question is how long as stated. it also has to do with how much water is being dealt with at the time as well. for example, my rain gear can handle an all day rain of mist (typical for oregon) all day long with no problems, but if i get into a hard downpour for 30-45 minutes of constant riding, then they start to get damp, borderline leak. if it's on the freeway and i'm caught in the whitewash (water blown up by other cars/trucks on the roads) then it is less. very situational. the key is to layer your rain gear correctly so that the water that does run off or drip or whatever has no chance of getting in between those layers. for example for rain boots, my jeans get tucked into the rain boots, zipped and velcroed, then the rain pants go over the jeans and boots and zipped/velcroed. the boots i found that work best in the rain are the ones that are 1 piece for the entire foot, and then zip and velcro on the inside of the legs.
the gloves and jacket is a toss up. if you layer your gloves over your jacket then water will run onto your jacket and run off with no issues so long as you're moving at speed. the second you stop or slow down enough, the water runs down your arms and into the cuff of the gloves., eventually working its way to the palms and fingers. yet if you layer the gloves inside the jacket, then you have the opposite problem. ive found that its best to layer the gloves outside of the jacket and use a glove that has an "extender" that can bunch up or tighten the cuff tight against the jacket to reduce water running into the cuff at stops or low speeds. if you dont have anything of the sort, buy some or use rubberbands heh.
ive found my gloves get soaked no matter what brand i use after a period of time riding in consant rain due to the outside of the hands/fingers being exposed. it really helps to have a plastic or nylon outer shell to slip over the gloves to reduce exposure to water itself. higher end gloves will have this feature built into them that you can slip on anytime (not while riding ofc). but even that can only do so much. next step is hand guards which is on my wishlist for christmas heh.
the key factor is to keep your core warm and dry. you can still focus and ride for much longer with your fingers, hands, toes, feet being cold/wet than you can with your core being cold/wet and your fingers, feet, etc being warm/dry. hope all of that rambling helps.