Well simply put I don't agree with that what so ever. And here is why.
Like I said over the last 5 years it has been my mission to figure out lake simcoe perch. Out of those last 5 years I can comfortably say that for the last 4 seasons I cannot recall a time where jumbos evaded me and going on an average of 15+ trips to the lake a season sometimes just to catch some fish and take some pictures. So you do the math. They are in there. Anyway about what I have found out.
I Always have a slabgrabber tied on one rod and a northland buckshot jigging spoon on the other. If I'm with a friend (only have a two man hut) i strictly use the northland jiggin spoons.
If it is just me and I am scouting areas the slabgrabber is the first thing down the hole it covers water and flashes bright and brings in any fish in the area. Once I have some interested fish down my hole regardless of size I switch to the buckshot tipped with 2"-2.5" minnow. I know crazy right. Every body keeps talking pinnheads. But for me over time I have discovered that the larger perch like a larger meal and the "dinks" can't inhale the larger minnows so it also allows you to sort through the fish in your hole and wait for that donkey that's sitting outside the pack. The larger minnow is also able to swim with the jigging spoon so it looks much more appealing and most of the time it's the minnow doing my work for me that's buts perch on the ice. Having said that have also found success when I have lost my minnow but don't feel like reeling just to put a new one on. When this happens very short but aggressive jigging seems to be the key. Moving no more then 3" but very fast and twitchy seems to catch the interest of a jumbo in the area.
Location is key I personally avoid crowded areas as a rule too much noise to many lines down too many options for the fish. You'll generally find me and my black gorrila taped clam out in no man's land fishing 15 to 30 FOW. Steep banks hold jumbos all throughout the lake if you can find a ledge you can find the perch. The structure on the bottom however is a different story I tend to look for more weeds on the brighter days and more open areas on the dimmer ones. I'm never fishing in an area that is too thick to see bottom I'm always fishing a mix but depending on brightness I'll lean toward open space or thicker weed growth.
Let the fish show you what to do. If you can see bottom as seems to be the case this year. Fishing is easier and the jumbos will tend to give themselves away if you pay attention. From what I've experienced the idea that "where there are little fish there are big ones too" doesn't exactly hold up. So when I'm fishing and all I see are smaller perch i am constantly looking down the hole to spot the cruising jumbo. Once I see one I make a mental note of where abouts it came from. If I get 2 or 3 more that come from that same direction that tells me I'm in the right area but no quite the right spot. It's often just a matter of going slightly deeper or shallower at this point. Again let the fish tell you. I tend to move about 15-20' in the direction they are coming from and more often then not it makes all the difference.
It could just be im extremely lucky or it could mean changing up tactics but this has been countless hours on the ice with a very specific purpose and alot, alot of very successful outtings to come up with a system that works continuously for me. I hope it helps you cure the curse of the simcoe dinkfest.