According to a Dell spokesperson this issue only affected a small number of customers.Users can find BIOS updates for their systems over on Dell's support site.But at least they agreed to finally post the thing.
Dell has released a raft of BIOS updates which should solve the underperformance/overthrottling issues that some users have been experiencing.
The BIOS updates are for E4200/E4300/E5400/E5500/E6400 (including ATG and XFR models)/E6500/ Latitude and Precision M2400/M4400/M6400 notebooks and incorporate changed algorithms for thermal tables to accommodate a broader usage models.
This should alleviate the issues that a small number of users were experiencing.
Some owners of Dell notebooks using the above processors were experiencing severe underperformance and overthrottling, so much so that performance was being cut to a fraction of what it should be even when the systems were running at normal temperatures.
The test that are carried out put a fair bit of stress on the system and they are hardly the sort of thing a Dell Latitude notebook should be expected to handle effortlessly.