theory and practical experience indicate otherwise.
The most common combination seems to be 10 speed Campagnolo Ergo levers with either 8 speed Shimano drive, or 9 speed Shimano provided the rear derailleur clamp washer is rotated a bit (what Shimergo practitioners call "hubbub" - photo here). 11 speed Campagnolo shifters also work with Shimano 9 speed systems. However, since 10 speed Campagnolo levers (e.g. Veloce 10) are significantly cheaper than Shimano STI levers (whereas Campagnolo 11 speed ones are comparably priced), Shimergo is useful solution for:
- upgrading Shimano geared bikes with down tube shifters - e.g. touring bikes, or old road bikes
- converting MTB drive trains for road use
- a cheaper and I'd say "sexier" option for replacing defective 8 or 9 speed Shimano STI shifters
- in some cases, improving braking performance, because the Campagnolo brake levers are likely to be an upgrade over the original brake levers
So, for certain bikes, Shimergo is certainly not a waste of time. What we need however, is some list of the known combinations of types and models that function well together (I mean with more product detail than the combination tables in Chris Juden's CTC article). And let's not stop with Shimergo. What about Sramano, which I have heard can work too? If any reader has first hand knowledge of a combination of mixed brand gear train parts and shifters that work well, please do add a little comment here with product and model details. If I can gather enough data, I'll make a table of it and share that interoperability info with everyone!