Re. target date, it was 2030 until last year when Metrolinx and the Ontario government "officially" rescinded it and said there is now no official target date.
Re. the 5 years of testing on line 5, both are Metrolinx projects, and we have no reason to think they won't do 5 years of testing again on OL.
Re. the construction problems at Eglinton Station and whether there was a crack in the foundation, remember that everything we know about construction problems and other delays in building line 5 (such as having to modify the vehicles) are based on leaked information. Officially, no details were ever released, and it's all information we were never supposed to know. So asking for evidence is a bit disingenuous, unless you're saying we shouldn't speculate or rely on unofficial sources when government suppresses information.
Back to a target date, in a previous post I said I wouldn't be surprised if OL opens as late as 2040, and someone immediately took offence and demanded I provide "proof" of this "claim". Well it was never a claim. What I meant was, estimated target dates are almost never met, and therefore are unrealistic (or garbage, to be more blunt), and considering the size of the project, I think 2035 for physical completion of the line is reasonable, rather than taking the most idealistic minimal time with no wiggle room for problems that may crop up, and calling that a target date. But that does no include the testing phase. Everyone seems to think that physical completion of construction equals opening date. Testing has taken 5 years in the past, and it could take 5 years again this time. So I stand by 2040 as a MAXIMUM time to opening, and I'm not saying it to be demeaning, just keeping it real.