I can't tell by the abstract. The threads, at the time, weren't discussing the abstract as the study itself was kicking around and as I recall being discussed in publications.

I'm pretty sure that study looked at what you mention being of interest above, but I can't say with certainty anymore. I can say by what I've read, experienced, been told by coaches and better riders, that if weightlifting has a place it's at some other point in the season for me than now.

As for the OP it depends on his goals.

A bag holds 10 pounds of beans. At some point (10 pounds) the beans spill out. Now one could theoretically mix less beans and something else, say corn, in to the bag and end up with a greater number of items. It's true. But it neglects to account for the fact that the one who owns the bag is a bean farmer and doesn't have a market for corn, never mind a corn/bean mix.

If one has X hours, let's say 8, a week to train they're far better off, if they want to improve at a given endeavor, to focus on that particular endeavor. If they have six hour they can ride, but feel they could do more physical activity, but can't ride due to work/family/whatever BUT they could get two gym hours a week....they MAY be better off getting the extra activity. BUT they also may be better off going harder during the six. Most importantly if one is scratching the edge of the time range where they're doing the maximal amount of quality cycling their body can handle they are going to diminish they're ability to recover and make use of that quality cycling if they add in more cross training of any kind.

As to weight lifting at the end of a road race it's a tough thing to explain as I'm an ex bodybuilder (80s). So I've done lots of weight training. But my ability to sprint predates that as I raced BMX through my childhood. I'm a fast twitch muscle guy. Chris Hoy can do all the weight lifting he wants but he's not beating Mark Cavendish in a road race (or a points race). On the track Cavendish would get sucked into and tumble around in the vortex created by Hoy's passing.

I return to my first post in this thread:

It is, of course, assumed we're in season. So if this was fall the conversation might be nuanced a different way.

If the question is how do I improve as a cyclist as quickly as possible: there's one answer.
If the question is how do I improve my overall health and fitness: there's another.
If the question is I like to ride but want to look good on the beach there may be yet another.
The question is ill defined thus the myriad answers and meandering conversation in the thread.

I can tell you this though...Mark Cavendish isn't lifting weights on his lead in to the tour. And Chris Hoy spends a ton of gym time year round. Now look at Wiggins before the Olympics (assuming he gets a pursuit berth) and see how much weight lifting he did between the tour and the olympics. That covers a bunch of the disciplines discussed here, in one of the most scientifically oriented cycling programs on the planet.

Things have their time and place. One needs to know when that is.