Yes (Blu-ray) – and while the image registration may not have been perfect (it’s hard and I’m new to it), it certainly wasn’t bad enough to cause that sort of distortion. In fact, I don’t think any sort of image registration problem could result in subtitles that are significantly thicker but have more or less the same placement and take up more or less the same amount of room.
But yes, all of my subtitle scans were stretched out horizontally to match the Blu-ray proportions.