I think there are many other criteria much more than only the academic performance. The behavioral performance is also important as students. There is shortage because of the external environmental effects, the extraordinary amount of social media communication techniques and the revolution of the IT,....etc
I do not think that students today - in the Internet era - are weaker than students from the 80s.
The Internet for the students today has two "sides" - namely "positive side" and "negative side".
The positive side of the Internet for the students is that they have access to almost all information that is important to them and that is distributed widely. Students can download this information easily and for free.
The negative side of the internet is that very often students have to spend a lot of time to find the right / relevant information. And this search for relevant information in today's Internet - in the address-oriented network namely - makes life difficult for students.
My pictures show how we can help all students so that they do not have to search long for important, good information.
In the Internet today, the information is stored as Web Objects and is accessible only via Web Addresses. No attributes are assigned to the Web Objects and this is a major drawback. Today's Internet can be extended to an Information (Content) Centric Network (ICN, CCN). The information as objects in the ICN can be better structured. To structured information in the ICN can be assigned corresponding attributes. This enables new ICN services to be designed and Internet Yellow Pages for Students can be realised – for example as Internet Sevice Go To. These possibilities illustrate my picture.
It should also be possible to enter in a browser only the name of the desired object to access it. On which host the object is, we are not interested. That means, we think according to the principle "Information Centric". The first known step in the direction of "Information/Name Centric Networking" is already realized with the help of DOIs (Digital Object Identifier). To get an article, we only need its DOI. From which server (host) we finally download the article, this is meaningless for us. The DOI of the desired article must be resolved to the location of the server with this article. Of great importance here is "DOI Resolver".
As my picture illustrates, URN (Uniform Resource Name) can serve as a kind of DOI.
In my humble opinion, we do not have a real criteria here for answering of that. Generally speaking I strongly believe that students of our days are much, much better informed compared with 80's students. Take a simple example: a student from our days, travelling in time, could finish successfully any equivalent 80's studies.
Regarding the time spent on learning and efficiency of that time (practically the time consumed to gain an amount of knowledge) the our days students are less motivated to do their best and thus are less responsible, mostly because they can gain the given amount of knowledge in less time with less effort.