This is wrong: the compilers distributed by the FSF (as part of GCC) have the linking exception. The ones distributed by AdaCore don't: they exercise their right to transform the modified GPL (with exception) into the GPL before redistribution. But the one in your Linux distribution is likely the FSF one.
No, it's absolutely correct. He wrote that the latest compiler doesn't have a linking exception, which is correct. The FSF compiler generally lags at least a year or two behind the AdaCore one.
For example, it has only just gotten (partial) Ada 2012 features, a full 3-4 years after the AdaCore GPL compiler.