The PhD on my team got through in less than 7. The immigrants crossing the southern border are still going through the same process, don't know why someone wanting a better life should cause high-skilled workers much worry.
Due to the per-country-quota limits, people immigrating from populous countries are stuck in multi-decade green card backlogs. Immigrants crossing the southern border from smaller countries might be going through the same process, but the per-country-quotas ensure that most of them will get their green cards much sooner than legal immigrants from populous countries.